The principle of small apartment interior lighting choice

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Reduction principle: the lighting in the room should play a finishing touch. Overly complex shape, too complicated colors are not suitable for simple design of the room.


Easy principle: Most people have experienced the replacement of ceiling lamp dilemma: stepping table Inspired by the chair, head 90 degrees, lift the arms too far to 2.5 meters or even higher ceiling. When choosing fixtures must consider replacing the lamp easy. No room should choose a chandelier, chandelier lamp because from the mouth to the ground is small.


Energy-saving principles: saving both energy saving light bulbs, lighting, sound, do not emit heat for long lamps. Large energy-saving bulbs are standard screw, and there are two caliber chandelier, one is standard, you can use energy-saving light bulbs; one is non-standard, you can not use energy-saving light bulbs.


Safety guidelines: Be sure to choose the regular manufacturers of lamps. Regular products are marked with the total load, based on the total load, you can determine how much wattage bulbs use, especially the most important for long chandelier, the number of head of each bulb wattage × = total load. Also moisture large, should use waterproof lamps.

Function principle: the use of different function rooms, should be installed in different styles, illumination lighting. They should be bright and splendid lighting; people should be used in bed feel the glare of lamps; children's room should be colorful, varied style lamps; toilet water should be used in simple style lamps; kitchen should choose easy to clean, clean lamps.

The principle of coordination: the overall style of the room should be coordinated with the lighting, and the same multi-room light fixture, should keep the color coordination or style coordination. Such as wooden walls, wooden cabinet, wooden rectangular top balcony, suitable for loading a rectangular wooden lamp. Wrought iron table with metal tube glass dinette rectangular hall suitable for loading a rectangular metal tube material chandeliers. Security cabinet door handles with gold, gold spotlights bedroom, with a suitable light golden.

Interpretation of color photographs and Mimi da ugly burst of reason

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Why do people shoot out photos are Mimi da, he shot out of the picture ugly death? You tangle for a long thing, it is actually very simple. We often talk about such things light, but never get my partner who talked a good light inside the human body have some touch vain things. Today, let's talk about the color of this kind of thing. Before chat color, let's talk about a few everyone will encounter scenes of life.

The following two strings of iron, which disk you want to eat more?


When trying on clothing skirt obviously left Jiang Zi, home only to find that kind of skirt is on the right spicy! Angry wrestling! Bad review!


See in the supermarket fruit is left of this mouth-watering, but at the roadside stalls to see the fruit may not like this.


Everybody should be able to observe, under different light sources, the same string of iron plate, with a skirt, the same fruit, whose colors are quite different! This relates to the color of the light source of the problem it!

What is the color of the light source?

The color of the light source, the light source refers to the object rendering natural colors extent. That is, the degree of color fidelity, often called "color rendering index" (Ra). Color is divided into two categories, "faithful color" and "color effect", we usually say, is a faithful color.

International Commission on Illumination (CIE) will sunlight color index is set to 100, and provides 15 test colors, with R1-R15 respectively represent the 15 color rendering index. When the light source with a predetermined reference light source by comparing the index value of 100 is the best.




R1-R15 What is a ghost?

So many colors! In the end what is the significance? Actually, each light source has a relatively sensitive to color, say some sources are more sensitive to red, then in its light, red objects displayed by the color will be more authentic, but other colored objects under its irradiation not be able to achieve a very real effect of color reproduction.



Professional speaking, light color evaluate the merits of the main consideration its R1-R8 8 types of natural color, R9-R15 7 kinds of test colors, reducing the total level of 15 colors, and we often speak Ra refers the average light on the R1-R8 8 types of natural color reduction level, R9-R15 is not counted.

We usually see lighting manufacturers label will be written when the product CRI Ra> 90 (R9> 50) and similar labeling method, Ra> 90 to show that the fixture color for R1-R8 8 types of natural high degree of color reduction, R9> 50 indicates that the lighting of the red object has good color reproduction capability.



How to choose the color of the lamp for the article?

Select the appropriate means of lighting was mainly based on the color of the illuminated object to the decision, such as the beginning of the article three comparison chart, the left side of the iron strings using high color rendering index R9 of light, so it looks more shiny delicious; red dress on the left is using a high color rendering index R9 of light, so it looks more vivid and bright colors; and left the supermarket fruit since the light source used in the color rendering index Ra is good, so it looks more appetizing.

Supermarkets and shops for meat shop window lighting, R9 CRI is particularly important; and for the studio, the studio that require a true representation of the skin color of the occasion, the lighting must not be lower index R15; museums, galleries other places are required for all colors can restore the true height of Ra and R1-R15 index seeks more stringent.



After reading the article, there are parents who have long wooden knowledge?

LED lighting voltage and Countermeasures

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Leakage current settings

Here refers specifically to the leakage current leakage current test voltage generated for us in the test set alarm thresholds. For the current human reactions are: current perception: Male 1.1mA, female 0.7mA; get rid of the current: Male 9mA, female 6mA (probability 99.5%); fatal current (current VF): 50mA (current duration than the heartbeat cycle) , 500mA (the current duration of less than 0.1 seconds). When the current flowing through the human body than 10mA dangerous, people have electric shock. Therefore, under normal circumstances, the leakage current standard definition of the type test is 5mA. GB 7000.1, a type test section and not clearly defined pressure test leakage current, and in the factory type test appendix, specify the size of the value.

Pressure tests and breakdown tests

Standard specifies the specific voltage value of testing. After the pressure test only shows insulation product can withstand the test voltage, insulation product can not explain exactly how much can withstand voltage. If the design and application of electrical equipment, insulation materials, need to determine dielectric strength, breakdown test will be carried out. Breakdown voltage test is the test of dielectric breakdown when. When the electric field intensity exceeds a certain limit, by the relationship between current and voltage is applied to the medium, the medium does not comply with Ohm's law, but a sudden increase. Figure 1, then the insulating material is destroyed and lose insulating properties. For electrical products, if the insulation breakdown occurs, it loses its operational use features.

Part of the customer requirements in accordance with the type inspection testing standards, do one minute test, which is the product "100 victims without a beneficial": First, it may reduce the rate of qualified products; second, to pass the test though, may damage part of the insulating structure so reduce product safety; third, it may damage some of the components, the quality of the product is reduced, life cut short. Pressure test passed, does not mean lamps intact. In many cases, LED lamp beads can withstand type tests, but will result in the extension of the lamp is off, but because the actual casting off greatly reduced lamp life.

Test Methods

A typical pressure test methods:

1. Check that the voltage tester main power switch is in the "off" position;

2, unless special design of the instrument, all dead metal parts must be grounded;

3, the device under test all the power input wires or terminals connected;

4. Close the device under test all power switches, relays and other;

5, the pressure tester test voltage = zero;

6, the voltage tester of high-voltage output line (usually red) is connected to the power input of the device under test;

7, the pressure tester circuit ground wire (usually black) is connected to the device under test can be touched uncharged metal part;

8, the voltage tester main power switch is closed, slowly raising the secondary voltage of the instrument to the desired value, generally boosting speed does not exceed 500 V / sec speed;

9, the test voltage is maintained within a specified time;

10, the test voltage slowly down;

11, voltage tester off the main power switch. Disconnect the voltage tester high voltage output line, then disconnect voltage tester circuit ground wire.

The following represents the device under test does not pass the test:

1. When the test voltage can not be raised to a specified voltage or voltage instead falls;

2, pressure tester when a warning signal.

Note that, due to the presence of a risk of personal high voltage withstand test, the test must be particularly careful.

Matters requiring special attention:

1, must provide that only trained and authorized personnel can operate the instrument into the test area;

2, must be placed fixed, clear warning signs in the area around the test, to prevent others from entering the danger zone;

3, when tested, including all personnel, including the operator must stay away from the device under test and test equipment;

4, start testing equipment, do not touch its output lines.

Common mode voltage capability improvement

· Add isolation transformer, effectively reduce the secondary circuit withstand voltage value through the transformer;

· Increased dielectric strength, such as a plastic, add insulation pads;

• Improve board voltage capability: a, choose the ability to withstand high dielectric layer circuit boards; b, the board increased creepage distance.

As lamp beads arranged where the circuit boards, wiring space and creepage distances are mutually contradictory. To increase the creepage distance, only wiring space compressed as much as possible. Try to avoid using sharp objects, in order to reduce its cut insulating substance, or because the tip of the discharge pressure cause breakdown. Such as minimizing the use of self-tapping screws; circuit board design, rectangular copper at a suitable position, do excessive treatment.

LED lights dimming applications under the LED drive power options

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     In LED lighting applications more widely, with better than traditional lighting methods unique, in addition to improving the quality of life, improve performance and extend lamp life light source, the use of its unique function dimmable lighting color temperature and brightness changes, and fully achieve energy saving applications for its biggest advantage.

Dimming performance LED lighting but depends on the mix of LED light source and drive power.

Generally speaking, LED light source can be simply divided into two categories: individual LED diode light source with a resistor or LED diode light source, in the application, sometimes LED light source is designed as a module containing the DC-DC converter this complex modules are not within the scope of this article. If the LED light source or modules for individual LED diode itself, the common dimming method to adjust the LED input current amplitude, so the LED drive power of choice should refer to this feature, Ming-wai's HLG / ELG family is characterized by currents adjustments can only be controlled modulation of the output current from an external 1-10VDC * or 10V PWM pulse width modulation, or even through a simple external variable resistor. And the other with a resistor LED diode light source (generally referred to as LED light bar or LED STRIP), LED lights are widely used LED diode having a resistor in series, the voltage is relatively stable, so the user can access any commercially available constant-voltage power supply to drive the LED light bar. Common LED lights generally based on 12VDC or 24VDC drive, but because of the dimming applications LED light bar can be a bit difficult. This article describes the use of the current amplitude dimming drive application of the LED light bar, and also discuss some common dimming issue, and also introduced an adjustable using the output pulse width (PWM) modulated light LED power driver, Ming Wei launched by the company and access to national technology innovation award recognizes a family of PWM, is currently on the market the most appropriate and easiest LED lights dimming scheme.

Common LED dimming poor condition:

Dimming may sound like a simple thing, in fact, want to have a good and smooth dimming performance is the need to consider many factors, the situation is common LED dimming poor are many.

When using the LED output current adjustable power driver for LED lights dimming when, dead travel is a recurring problem. Although when the LED drive power is in fully loaded condition (as illustrated 1-a) can be operated when the ground is very good, but when the LED driver in a non-full, not smooth dimming state is very obvious.

PS:A new generation of Meanwell LED driver features DC 0-10V

   Meanwell LED Driver HLG-100 at different loads (length) coupled to the LED status lights: (a) 100% of full load - can produce the best dimming performance; (b) 70% of the load - it shows the imperfect dimming effect; (c) 30% of the load - shows poor dimming results because dimmable too restrictive.

The output pulse width modulation (output PWM) Solutions

If you are used under full load conditions LED driver power supply LED lights dimming applications, dead travel problems would not exist. The above argument is true, but not very practical, in fact, LED lights are often used in a variety of applications (Decorative lighting / auxiliary lighting / Advertising Lighting) can not be accurately estimated at length because of circumstances, so the easiest is the best application solutions is the right choice should be an output pulse width of the PWM LED dimming drive power to achieve LED lights dimming requirements. While the output brightness is by virtue of the duty cycle of the dimming signals to achieve lower brightness dimming changes, important parameters of the drive power is dimming resolution and output pulse width modulation PWM frequency, minimum dimming capability should be as low as 0.1 %, in order to achieve 8bit dimming resolution to meet all LED lights dimming applications, the output pulse width modulation PWM frequency should be able to raise as much as possible, to prevent the table (a) said light flicker problem, according to the relevant Research reported in the literature, the frequency is recommended at least above 1.25kHz, to reduce ghosting visible to human eyes blink.

Hot luminous efficiency LED light engines resolution

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We all know that LED is a semiconductor light emitting device, the semiconductor device is a heat-sensitive, which means that it is very sensitive to temperature. Or that the temperature will directly affect its performance and parameters. As an electrical - optical conversion device of its most important indicator is the number of watts of electrical power input, how much light output (lumens), which we call light efficiency (luminous efficiency), this indicator represents the most important indicator of quality of the LED. The user is required according to his luminous flux (lumens) to choose the lowest wattage LED.

However, although the device itself has a LED light effect, but does not mean that users will be able to enjoy the luminous efficiency directly, because this LED lighting device will be assembled into the loss of part of the light effect. Let us not consider the mask transmittance (assumed to be 100%, in fact, usually around 90%), while the main LED light source itself to consider the light effect. This light effect we are also divided into two kinds of thermal efficiency of luminescence efficiency of light. Most people probably will not notice the difference between these two luminous efficiency, so we are here to discuss the first light luminescence efficiency and thermal efficiency issues.

1. What is the effect of what is hot cold light effect

Simply put luminescence efficiency LED light source that is at room temperature (25C) when measured luminous efficiency, light and heat efficiency is measured and other light effects LED light source after thermal stabilization. Specifically, we usually integrating sphere to measure efficiency LED light source, the power measured immediately after the luminous efficiency is obtained luminescence efficiency (assuming that time at room temperature is 25 degrees), the "immediately" About 5 within seconds. The thermo-optical effect is to wait at least half an hour to three quarter of an hour to reach thermal equilibrium (or heat-stable). Now we usually say that the light effects are luminescence efficiency, or that we usually indicated on the packaging or in the shell luminous efficiency indicators mostly luminescence efficiency.

For most users, they are mainly concerned with actually thermo-optical effect. Because LED lighting is the use of more than half an hour, unfortunately, only the user knows the luminescence efficiency of light fixtures do not know the heat efficiency of the lamps, which in a sense, this is an unintended outwit consumer behavior.

Anyway, I suggest that in the future should be based on a thermo-optical effect as the light efficiency targets, marked on the box.

2. luminescence efficiency and thermal efficiency of light how different

Here we look at the effect of cold and hot light effect in the end there is much difference. To better understand the differences between our various well-known brands of LED PAR lamp cold light effects, specifically to the United States and Japan to buy several well-known brands LEDPAR lights for the actual test results obtained are as follows:

Wherein the start value after power is measured immediately, the end value is the value of the test after waiting half an hour later.

For example Philips 432 195 type bulb lumen output, after half an hour, reduced from 1860lm to 1680lm, reduced to 92%. Specifically lumen depreciation process is shown below.

In fact, half an hour is not yet fully reach the stable value, you may also need three quarters of an hour or an hour to genuine stability.

Above table can be drawn the following conclusions:

(1) light effect the start and end values ​​for all of the brand LED lamps is different.


(2) a minimum difference of 0.97 and a maximum of 0.86

Difference (3) of the input power and thermal characteristics LED is actually unrelated.

(4) differences in luminous efficiency is mainly due to the LED junction temperature rise due.

(5) junction temperature rise can not be avoided, because the LED itself is only about 40% efficiency, the other is converted to heat, thus increasing the heat after power up, and finally rose to the value of thermal stability from room temperature. But the size of the increase in value is related to the quality and the radiator. Radiator better temperature lower. Therefore, in order to reduce the difference in thermal efficiency and light luminescence efficiency, it should be possible to adopt good radiator.

3.LED light engine cold light effect

Why should we study special LED light engine cold light effect, this was because the light engine has its special. The so-called light engine is actually put into the LED light source LED power supply is also where the aluminum substrate, this way, the power LED power consumed are also released on the aluminum substrate, which increases the aluminum plate to the heat, but also will increase in the future LED junction temperature thermal stability. Here is an example to illustrate the current market, the most common is a non-electrolytic capacitors light engine, its power efficiency is usually only about 85%, which means there will be 15% of the input power is converted to heat and added aluminum substrate. Assume that the total input power of 10 watts, is applied to the remaining 8.5W LED, the luminous efficiency of LED itself is assumed as 40%, which is only 3.4W of power into useful light, there are 5.1W power into heat. Originally aluminum plate as long as the heat dispersion 5.1W now to add 15% of the power is 1.5W of heat, for a total dispersed heat 6.6W, an increase of 29.4% of the heat, close to 30%. The aluminum plate thermal resistance did not change, it means that the power to increase the temperature rises, the temperature of the aluminum substrate increases, meaning that the same aluminum plate LED ambient temperature, junction temperature with increasing , the result is reduced luminous efficiency.

The actual test results 4. LED light engine thermal efficiency and luminescent light effects

We tested a Shenzhen company produces 60W light engine without electrolytic capacitors, as well as Real Green Lighting Company's production of electrolytic capacitors 60W light engine. Both the shape of the photo as follows:

1:Shenzhen company no electrolytic capacitors 60W light engine

2:Real Green Lighting electrolytic capacitors 60W light engine


When tested using the same radiator, so different from the two cooling affect the test results. Both the total flux of light engine changes with time the results are as follows:

1:Shenzhen company no electrolytic capacitors 60W light engine
2:Real Green Lighting electrolytic capacitors 60W light engine


The total flux from the former just getting machine 5780lm, after half an hour down to 5120lm, declined by about 11.4%, and the downward trend from the point of view, it should be further reduced over time to 5000lm. The Aifei Lai's engine light flux dropped from 7233.8lm to 6486.8lm.


Input power of the two curves as shown below:

1:Shenzhen company no electrolytic capacitors 60W light engine
2:Real Green Lighting electrolytic capacitors 60W light engine

Shenzhen company because light engine also uses power compensation (see above), its input power within 30 minutes increased from 57.81W to 59.53W. So it's light efficiency is reduced from 100lm / W to 86lm / W, reduced by 14%. If the heat flux is finally stable after 5000lm, its last light efficiency is only 84lm / W, down 16%. While its nominal light efficiency is 100lm / W, if the luminescence efficiency from the point of view, or to achieve, but if the heat from the light efficiency point of view, it is the difference of 16%.

he Real Green Lighting of 60W electrolytic capacitor light engine, its power within 30 minutes dropped from 62.53W to 60.354W (closer to the rated 60W), so it's light effect from the beginning of 115.68lm / W, down to 107.48lm / W, fell by only 7.1%, and the general decline in the range of about lamps. This corresponds to the LED junction temperature rises from 25 degrees to room temperature rating of 85 degrees design junction temperature caused by normal light efficiency decreases. This is because the constant current source Real Green Lighting efficiency up to 99%. So put such a high efficiency constant current source is integrated into the aluminum substrate does not increase the thermal stability after the LED junction temperature. So the difference between hot and cold light effect light effect or within the scope of normal.

By the way, we compare the difference between two kinds of light engines here nor is itself due to the different LED light effect caused by the former of a company no electrolytic capacitors used in LED light engine is a great wafer 3535, which area 1225mil2, while the Real Green Lighting has electrolytic capacitor LED light engine is used in 3518, its area of only 630mil2, a difference of up to 595mil2, but also the former great. The absolute value of Real Green Lighting hot light efficiency is as high as 107.48lm / W, than the company's 86lm / W to up to 25 percent.


5. The difference between the various non-electrolytic capacitor light engine

Although we only measured a certain company, one of our products cold light efficiency difference. Some may raise this is the point behalf of the face, less comprehensive advice. If the accuracy of the data, it is indeed the case, but if the results approximate data, these results are a great representative. In fact, the reason is very simple, resulting in the difference between hot and cold light efficiency of the main reasons is because of the low efficiency of the current source and the light source is integrated into the aluminum substrate together, thus causing the LED junction temperature than those without constant current source junction the temperature is higher, so it's certainly hot light efficiency is low. For switching power supply, it is possible to achieve efficiency of 95%, but because of the switching power supply device, large volume, it is impossible to be integrated into the aluminum substrate. So now all integrated into the aluminum substrate to have a linear power supply only. Of course, the type of linear power supply, there are many, and now with the most is a segmented light lit no electrolytic capacitors engine, there is a direct constant current diode electrolytic or non-electrolytic capacitor light engine, but whether it is which linear power supply, its efficiency curve is exactly the same, are the mains voltage increases linearly decreases at 220Vac is about 85% (see figure below).

The efficiency of all linear current source

The Real Green Lighting although a constant current source is a linear constant current source, but due to the intelligent adaptive adjustment technology, making its efficiency up to 99% (see figure below).

Real Green Lighting efficiency constant current source (constant current source itself blue line efficiency, including red line for the overall efficiency of the rectifier)

Real Green Lighting light engine in order to remove the impact of the rectifier, rectifier and usually all the protection elements on the outside of the aluminum substrate, the aluminum substrate efficiency of only 99% of the constant current source. So it's hot and luminous efficiency can be maintained without the same constant current source.


Conclusion

From here we come to an important conclusion is that: Only high efficiency constant current source to be able to be integrated into an aluminum base plate made of a light engine, they are not because of the low efficiency constant current source LED junction temperature increase and reduce its thermo-optical effect. The low efficiency constant current source is integrated into the aluminum plate is to improve the results of the LED junction temperature, thereby reducing its thermal efficiency, and the difference this cold light efficiency is much greater than the differences between conventional LED lamps, in the above example the difference up to 15%.

Therefore, we should require that all light engine LED lighting manufacturers should be the thermo-optical effect indicated on the product packaging. So as not to mislead consumers.

20 must know the lighting design points

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Lighting design is an important part of the architecture and interior design, but also is an important means for the construction of the last increase "light" Tim "luck". The most important task of architectural lighting design is based on visual needs of consumers, by means of clever mobilization of light and shadow, modification and beautification of buildings for people to create beautiful, comfortable visual environment.


The following is a lighting engineer for architectural lighting design 20 recommendations:

1. In architectural lighting, artificial lighting and daylight have equal importance.

2. daylight can be supplemented by artificial lighting. Artificial lighting can either supplement the sun, it can also create completely different from the effect of sunlight atmosphere.

3. The illumination light source quality and reasonable choice. Incandescent and halogen lamps for brightness, color, quality and a high degree of dimming performance requirement, compact fluorescent lamps and high-strength discharge light source is used to emphasize energy efficiency and reduced maintenance applications.

4. The life of electronic transformers and electronic flow inversion allows the light source can be improved, and reduce energy consumption.

5. Each lighting project should have a maintenance plan, such as regular replacement, cleaning or eliminated illuminator.

6. The lighting device functions as doors and windows, is an integral part of the building can not be ignored, rather than some kind of interior design and decoration.

7. Evaluation of the quality of the illuminator important factor, which is a combination of functionality and can reach its maximum visual comfort and optimal lighting efficiency.

8. As part of a building structure in detail, should be very carefully chosen lighting

9. In the luminaire arrangement should take into account the requirements of functionality and architectural design.

10. The lighting and lighting design is an integral part of the architectural concept.

11. lighting wiring, you should consider a different function room.

12. In the design of the lighting conditions when a working environment, should consider the best visual comfort.

13. The brightness sensation environment, by indirect lighting facade lighting wall or ceiling to achieve.

14. accent lighting can lead people to a point of interest, and to help people understand the environment in a space.

15. In order to reduce energy consumption, natural lighting of the work area should be combined and artificial lighting.

16. Choose one appropriate lighting levels according to different working environment, to ensure the quality of lighting, while also considering energy-saving effect.

17. In order to create a different atmosphere and the best lighting effects, lighting design should consider the use of lighting control systems.

18. Even in the interior lighting design, but also should take into account the effect of the night lighting outside.

19. The structure of a building's design can be best reflected by excellent lighting design.

20. Lighting and lighting effects not only an important part of architectural design, but also the company's corporate image of the shape tools

US-made floor lamp and table lamp recall

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March 18, 2016, the US Consumer Product Safety Commission (CPSC) and IKEA jointly announced on Chinese-made floor lamps and table lamps voluntary recall.


The recalled products English name: Gothem floor and table lamps, is the appearance of a nickel-plated floor lamp and table lamp with a dimmable switch. Floor lamp 49 inches high, 14-18 inches tall lamp, printed with "Gothem" and the IKEA trademark label on the base of each lamp. The product in October 2015 --2016 in February US IKEA store and online sales, about $ 20-50 / month.


The recalled products sold in the US number about 30,600. Hazard: cable lamp in the production process may be damaged, causing the user may come into contact with live metal parts of the lamp, there is a risk of electric shock. Up to now, the company has received several reports of incidents from around the globe slight electric shock.

To this end, the US Consumer Product Safety Commission (CPSC) advises consumers to immediately stop using the recalled products and return them to IKEA stores were full refund.

LED lighting needs and design elements in different areas of the mall Analysis

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Mall LED lighting is considered one of the most mature, fast-moving field. The mall is not only a place to buy goods, but also to create a suitable environment for leisure, lighting effects really contributed, LED lighting has a strong advantage in the expression. But whether the LED lighting market in the mall as there is a greater need for human needs based on specific lighting environment and consumers, to refine performance parameters and lighting effects for each product.


Shopping lighting design is the customer to buy goods behavior, browsing, selection process, according to the characteristics of visual requirements of customers and a variety of different commodities, each commodity in which the space, scientific design, to meet customer feel comfortable visual effect.

At the same time, reasonable illuminance (commonly known as brightness), excellent color reproduction, a suitable brightness distribution, and comfortable visual environment; reasonable lighting design, can attract the customer's attention to the goods, to create a comfortable shopping environment the desire to stimulate customers to buy. This article will mainly focus on the needs of lighting and design elements shopping malls in different regions analyzed.




First, luminance, color temperature affect people's psychological feeling


Lighting illuminate not only function, but also have an impact on human psychology: The higher the temperature feels will be more relaxed, and vice versa, the lower the more warmth. Psychologists have found that red environment, people will speed up the pulse, blood pressure was increased, emotional, easily excitable impulse; blue environment, the pulse slows, the mood is also more quiet. Different colors reflect different taste, which is human instinct to see things in relation to, for example, see red, yellow, think of apples, oranges and so on. Red, yellow has a sweet, sweet and sour sensation, can stimulate the appetite increased appetite; and dark-green, blue-green bitter feeling, it will affect the appetite.

Different color temperature and illumination of the impact of human psychological reactions vary greatly, depending on the environment of space impression impression color temperature and illumination of the decision. Japan controls the degree of psychological feelings of people do a lot of research work, high color temperature need high color, low color temperature needs illumination.


The main purpose of the store lighting by providing appropriate lighting and illumination, color temperature, color rendering and brightness changes for different commodities and regions, generating interest through "commodity visualization" to attract consumers, with the silent language of communication with customers to customers communicate product information, service philosophy and brand culture, in order to achieve the promotion of merchandise sales, reduce inventory, establish a brand image purposes.

In order for merchandise display in front of customers, the proper use of the corresponding light to attract the attention of customers, causing customers to buy the activity is very important. Optical shop space can be considered from the interpretation of space overall impression "spatial light" effect of the effective display of goods "light goods" in both directions. Lighting in the shop, the ambient lighting, accent lighting and decorative lighting three lighting elements complement each other, with the corresponding lighting plan in line with the concept of this shop.

Second, the different areas of the mall lighting

Malls and shopping centers in different regions of different types of segments, the specific requirements of different lighting effects, lighting design so its focus is different.

At present, ambient lighting lamps and light sources used include shopping malls CFL downlights and T5 / T8 fluorescent lamp bracket Grille and metal halide. LED light source as a new generation the opportunity to enter the mall based lighting is appropriate? Experts generally believe that commercial lighting is LED general lighting applications, the first to enter, improve flux, reliability and price are key to its rapid intervention. Shopping lighting can be further refined based on different occasions, different commodities lighting requirements are different.

(1) fruit, flowers and strange


Fresh produce and flowers have the most bright colors, pure white lighting effects can be most directly reflects the verdant green and fragrant sweet red. Red yellow and other dark fruits with a warm light around 3300K, green and other colored vegetables for general use 4500K-5500K cool white, the color should be 80 or more. LED has a very wide range of color temperatures, you can restore the items most brilliant vivid colors, increase customer purchase desire to enhance the circulation of goods and fresh.

(2) Meat and poultry

Quality fresh meat and poultry products must look clean, a touch of pink to make beef and mutton look more fresh. Warmer tones balanced lighting allows meat and poultry food look more attractive fresh. Combined with a low color temperature red LED light source spectral content of more, not only can increase meat color effects, and less infrared heat radiation, is conducive to a more permanent storage and corrosion.

(3) marine food

Quality fresh fish and marine commodities region should adopt different from other commodities area, cool colors lighting. Cool-white lighting effects easy for consumers to think of the clear waters, and allows seem to have a seafood fresh from the sea salvage from the freshness. Combined with a high color temperature more blue spectral components of the LED light source, not only can increase the effect of color, and less infrared heat radiation, is conducive to a more permanent storage and corrosion.

(4) baking frying foods

Warm yellow lighting makes even more tempting baked goods, giving a feeling of freshly baked. Baked goods into the area, where consumers will find this light into a light yellow amber. Soft amber lighting effects to make people feel prepared pastry unique warmth and enticing aromas. On the shelf with the same soft, warm lighting after, can further enhance the overall visual effect.

(5) jewelery category

Jewelry is a luxury, prices are generally more expensive, so to ensure that counter the bright eye-catching, harmonious interior light, clearly showing the correct color of jewelry, jewelry show meticulous craftsmanship and true color to attract the attention of customers, most issued lure people light, to attract customers to buy.

When choosing lighting for the jewelry store, the focus of the factors to consider include color temperature, illumination level, flicker, infrared ultraviolet. According to statistics, in the light irradiation jewelry 3300K-7000K color temperature can show the best appearance. Different requirements of different jewelry, such as gold jewelry, emerald and diamond lighting requirements are very different. Because the current LED color temperature range, heat a small, almost sub-ultraviolet and infrared, to become the new darling of jewelry lighting.

(6) apparel goods

Apparel varieties, showing a lot of ways, the effect of natural light and warm the best. General use downlights, spotlights a variety of adjustable angle do accent lighting. Halogen and metal halide light source, mostly, the color demanding. However, halogen and metal halide has the characteristics of large heat, LED spotlights high color rendering, LED lamp, can effectively solve these problems.


If the color temperature adjusting technology to clothing display lighting, you can create a cool summer, warm winter shopping atmosphere of apparel merchandising of great help. Relative halogen lamps, metal halide lamps and fluorescent tubes, LED light source has some outstanding advantages, such as high efficiency, energy saving; long life, low maintenance; wide range of color temperature control is simple and flexible, adjustable light color; LED substandard mercury almost no infrared ultraviolet, green and so on.

LED SMD Epoxy glue and basics

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1, the role of surface mount adhesive glue adhesive (SMA, surface mount adhesives) for wave soldering and reflow soldering, mainly used for the components mounted on the printed circuit board, usually with dispensing or stencil printing method to allocate , to maintain the position of the component on the printed circuit board (PCB) on, to ensure that transfer element in an assembly line process is not lost. After the paste components into the oven or reflow welding heat-curing. It is the so-called paste is not the same, after a heated hardening, reheating does not melt, that is, plastic patch thermosetting process is irreversible. SMT plastic patch effect due to the thermal curing conditions, the linker, the equipment used, different operating environment differ. To be selected patch of plastic production process according to use.


2, most of the surface mount adhesive (SMA) components PCB assembly of glue used are epoxy resin (epoxies), although there are polypropylene (acrylics) are used for special purposes. The introduction of high-speed dispensing system and electronics industries to learn how to deal with a relatively short shelf life of the product after the epoxy glue has become more mainstream technology Shijiefanwei inside. Epoxy resins generally wide boards provide good adhesion, and has very good electrical properties. The main ingredients are: base material (ie, high body material elements), fillers, curing agent and other additives.


3, plastic patch intended use of a. In wave soldering components to prevent falling (wave soldering) b. Reflow soldering components off to prevent the other side of the (double-sided reflow process) c. Prevent displacement and vertical components when at (reflow process, the pre-coating process) d. mark (wave soldering, reflow, the pre-coat), PCB and components batch change, marked with a plastic patch.

4, the use of glue dispensing a classification type: By dispensing device on the printed wiring board sizing. b Squeegee type: sizing by stencil or screen printing copper Scraping way.

5. The method of SMA Epoxy Epoxy can be used syringe method, the needle transfer method or template printing method applied to the PCB. Transfer method using a needle less than 10% of all applications, it is the use of needles arranged array immersed in a plastic tray. Then hanging drops of glue transferred to the board as a whole. The system requires a low viscosity adhesive, but also a good moisture absorption resistance, because of its exposure in the indoor environment. Control the needle transfer Epoxy key factors including needle diameter and style of glue temperature, cycle length and depth of the needle immersed Epoxy (including time delay before the needle PCB exposure and periods). Pool bath temperature should be between 25 ~ 30 ° C, which controls the amount and form of plastic viscosity and gel point.

Templates are widely used in solder paste printing, and distribution of glue can also be used. SMA Although less than 2% of the model is printed, but the interest in this method has increased, the new device is to overcome some of the limitations of earlier. Correct template parameter is the key to achieving good results. For example, contact printing (zero off-board height) may require a delay cycle allows good dot formation. In addition, the polymer template non-contact printing (approximately 1mm gap) requires optimum blade speed and pressure. Thickness of the metal template is generally 0.15 ~ 2.00mm, should be slightly larger than (+ 0.05mm) gap between the component and the PCB.


Finally, viscosity and temperature will affect the shape of the gel-point temperature of most modern dispensing machines rely on the needle mouth or chamber capacity control device to keep the glue temperature above room temperature. However, if the temperature of the PCB is improved from the previous procedure, then the outline of the gel-point may be damaged.

Product testing standards LED optical properties

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Optical performance is particularly important for LED products, LED products, so whether we understand what photoelectric performance? Let us work together to learn about LED photoelectric products which performance testing standards.


1. The electrical characteristics

LED electrical parameters including forward current, forward voltage, reverse current and reverse voltage, the voltage meter test generally use test under constant current source power supply situation. Allow for maximum forward voltage, forward current and reverse voltage and current parameters by testing the electrical characteristics of the LED, it can also work to get the best value of the electric power of the LED.

2. The optical properties

Including luminous flux and luminous efficiency, light intensity and light intensity distribution and spectral parameters.

Luminous flux and luminous efficiency: There are generally two methods for integrating sphere method and variable angle photometer. While the latter is the most accurate test results, but takes a long time, generally use the former. When tested by an integrating sphere method can be placed in the center of the sphere LED test can also be placed in the ball wall. After the measured luminous flux, with electrical parameter tester can be measured LED luminous efficiency, which is light efficiency.

Light intensity and light intensity distribution characteristics: LED because the light intensity distribution is inconsistent, so it's with the test results from the changes in the size and the detector size varies, allowing each LED light intensity test and evaluation under the same conditions, such results more accurate.

Spectral parameters: including peak emission wavelength, spectral radiation bandwidth and spectral power distribution. The spectral characteristics of the LED can be expressed by the spectral power distribution, via spectral power distribution, can also get color parameters. Spectral power distribution tests are usually carried out through spectrophotometry, mixed monochromatic light distinguish individually measured, it can be a prism and grating spectral.

3. Switching Characteristics

Refers to light, electricity, color change characteristic LED power on and off instantly, and can be obtained through LED power variation instant working conditions, material properties, etc. through this test, to understand the power of the LED through the loss.

4. The color characteristics


The main non-ferrous coordinates, dominant wavelength, color purity, color temperature and color, etc., test methods spectrophotometry and integration.

Spectrophotometry: spectrophotometric monochromator measured by LED spectral power distribution, and use of color weighting function integral to obtain the corresponding color parameters.

Integration method: the use of a specific color filter with photodetectors directly measured color parameters.


5. Thermal Properties

Also refers to the junction temperature and thermal resistance, thermal resistance refers to the temperature difference between the heat flow along the channel on the channel power dissipation ratio, LED junction temperature refers to the PN junction temperature. There are two LED junction temperature test method is the use of infrared temperature measurement microscope or miniature thermocouple measured the surface temperature of the LED chip, and the other is to use the inverse ratio between the forward bias current to determine the junction temperature changes to determine the relationship between the LED junction temperature.

Technical requirements in North America LED energy saving lamp detection

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A, LED status of the North American standard


LED lamps as a new product, currently existing North American product safety standards is no specific technical requirements for such products, the test LED products become an issue in the industry. American UL laboratory for the current industry conditions, is organizing the preparation of LED energy-saving lamps safety certification standards UL8750, this standard is still draft, has not been officially adopted as the certification standards. Thus, the problem of certification testing LED energy-saving lamps, temporarily not been completely resolved.

The basic principle of LED energy saving lamp is the AC power conversion by switching DC power supply module, power supply to the light emitting diode to work. According to the basic principle and structure characteristics of energy-saving LED lights, the United States proposed transitional MET laboratory testing scheme at this stage: the traditional energy-saving lamps US certification standards UL1993 (corresponding to Canadian standard CAN / CSA-C22.2No.0, CAN / CSA-C22.2No.74), and a power module standard UL1310 or UL1012 (corresponding to Canadian standard CAN / CSA-C22.2No.107) LED energy-saving lamps for testing and certification.

Second, detection techniques

Hereinafter, according to UL1993, UL1310 and UL1012 standards, LED energy-saving lamps certification testing of the key issues, do some elaborate.


1. material

LED lamps can be made into various shapes to fluorescent tube LED energy-saving lamps, for example, its shape like an ordinary fluorescent tubes as fluorescent tube made of transparent polymer shell of the power module and LED package inside. Transparent polymer shell fire and electric shock play functionality in the product. According to the standard requirements of energy-saving lamp shell material is required to achieve V-1 grade or more, the transparent polymer shell V-1 shall be above the level of materials used.

The point to note is that the product housing to achieve the desired V-1 rating, which must be greater than a thickness equal to the thickness of the V-1 grade raw material required for fire rating and thickness requirements can be found on the UL yellow card of raw materials . Actual testing found that the manufacturer in order to ensure the brightness of LED lights, often very thin transparent polymer shell, which requires test engineers taken to ensure that the material reaches a desired thickness fire rating. Due to the different materials of the same fire rating have different thickness requirements, certain raw materials at a smaller thickness to meet the higher fire rating requirements, recommended that manufacturers can select suitable raw materials to make products shell.

2. Drop Test

By product standards, product drop to simulate actual use situations that may occur as a drop test, the product fell from the height of 0.91 m high hardwood board products shell can not break even expose hazardous live parts inside. When manufacturers make products shell material selection, we must consider the strength requirements.

3. Dielectric strength


Transparent shell surrounded by the power module inside the transparent shell material must meet the electric strength requirements. According to standards, based on conditions in North America between 120 volts, the internal high-voltage live parts and enclosure (covered with metal foil test), to be able to withstand the electric strength test AC 1240 volts. Under normal circumstances, the product shell thickness of about 0.8 mm, which can meet the electric strength test requirements.

4. Power Module

Power supply module is an important part of energy-saving LED lights, the power module switching power supply technology. Press the power module types, consider using different standards for testing and certification. If the power supply module is classII, which can be used to test UL1310 certification. classII power refers to the use of isolation transformer, the DC output voltage is below 60 volts, the current is less than 150 / Vmax amp power supply. While the non classII power, is used to test UL1012 certification. These two standards are very similar technical requirements, refer to each other. Most LED lights internal power supply module is the use of non-isolated associated power supply with output DC voltage greater than 60 volts, and therefore does not apply UL1310 standards applicable UL1012

5. Insulation requirements

Because LED lamps internal space is limited, the structural design, pay attention to insulation requirements dangerous live parts and accessible metal parts between. Insulation can be spatial distance and creepage distances, it can be an insulating film. According to standards, between hazardous live parts and accessible metal parts to the spatial distance of 3.2 mm, the creepage distance is 6.4 mm. If the distance is not enough, you can add insulation sheet as additional insulation, the insulation thickness greater than 0.71 mm, if the thickness is less than 0.71 mm, the product will have to be able to bear 5000V high voltage test.




6. Temperature test


Temperature test is a must-do project product safety testing standards for different elements have certain temperature limits. In the product design phase, the manufacturer must pay great attention to the heat of the products in question, especially for some parts (such as insulating films and so on) should pay particular attention.

If long-term member at a high temperature, easily damaged, resulting in a fire or electric shock hazard. Lamps internal power module is enclosed in a small space, cooling is limited. Therefore, the manufacturer component selection, pay attention to choose the specifications of the appropriate elements to ensure that certain elements in the margin work, thus avoiding long-term element at near full load conditions arising from overheating.


7. structure

LED energy saving lamp power supply modules installed inside the housing, limited space, some manufacturers in order to save space, the pin-type element surface soldered on PCB, this approach is not acceptable. The surface of the welded pin-type element is likely to fall due to the Weld and other reasons, resulting in danger. Therefore, these elements should be taken as welding jack. If you had to take surface welding, we have this piece and glue the fixed components using other means to provide additional protection.

8. Failure Test

Failure of the product certification testing product testing is a crucial test project. This test project is shorted or open some elements of the line, in order to simulate actual use failure may occur, in order to assess the product under a single fault condition safety. To meet this safety requirement, in product design, consider the product plus the appropriate input fuses to prevent output short circuit or over current internal component failure resulting in a fire hazard.

Third, the factory inspection

North American product certification for a factory inspection, factory inspection including the first factory inspection and follow-up inspections. If the plant is the first application in North America, product certification, will carry out the first factory inspection. The first factory inspection focused on quality assurance system of the plant, asked the factory with perfect quality assurance system to ensure product quality and ensure effective supervision. If the plant has established quality management system according to ISO9000 standards, and adopted the ISO9000 certification, basically in line with the first factory inspection management system requirements. If the plant does not pass the ISO9000 certification, we will have in the procurement of raw materials, incoming inspection, inventory management, product design, engineering changes, production line testing, instrument calibration and other aspects of the complaint follow a clear program files, and effective implementation. Follow-up inspection is aimed at checking the product structure and product testing and other aspects of the production line to ensure consistent product mix and sample certified production line, and through the relevant production line testing. After the product manufacturer through testing and certification, must strictly follow the structure and components of the sample list of certified product production, any changes may involve product safety certification organization must notify evaluated. If necessary, you may want to modify and re-test reports. Test reports in the test products on the production line is clearly required, the manufacturer must be related tests, such as high-pressure test, ground continuity testing as required.

A typical hospital places lighting design ideas Comments

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Asian Association of Lighting Designers News AALD hospital lighting is an important means to embody the image of a modern hospital.

Modern hospital has a good lighting system, in bright and comfortable environment can relieve negative emotions of patients, healthcare workers to ensure quick and efficient completion of the work.

Table: Building illuminance value "architectural lighting design standards" in hospital

Outpatient department

Medical sector is the backbone of the hospital, so consider a comfortable environment full play to its functional role. The use of this part of the practice during the day, so rely on the first floor of the room artificial lighting should consider natural light from the illumination of the door fired into balance.


Public Lobby

Public hall mobility is the most frequent central area, and the clinic, corridors and staircases phase. If the public lobby is atrium forms of lighting, gas discharge lamp should be selected mainly in the tribunal shall deal with natural light and artificial lighting of a smooth transition to prevent the atrium around the corridors illumination is too low, the brightness of the gap is too large to cause visual discomfort.


Natural light and less space to install a shared hall lighting to consider ease of maintenance and repair, a small spot lights mounted on the side wall of the hall corridors, service personnel standing cloister to the edge of the hand can touch lamps, it is convenient to maintain, easy to Spotlights alignment angle to soften the light evenly illuminates the hall space. Registration, fees, laboratory and other services inside and outside the window lighting should be bright, because the medical staff and the patient or family members need to review and verification of the transfer of documents and fees.


Public walkway

Unlike public walkway outpatient and emergency ward medical technology building, quiet environment for patients, it should be even and soft lighting. Therefore, the illuminance is relatively low, generally around 50lx. Warm light fixture should be embedded or small compact fluorescent lamps. Each ward door walkway consists of a night patrol with footlights for nurses, general lighting can be turned off at night.


Public walkways safe passage of each port, above the door leading to the outdoor stairs or safety should be installed "safe exit" sign lights, over a long walkway around the corner to install evacuation lights, and the evacuation lights spacing should be equal to or less than 20m.


Consulting Room

Horizontal and vertical illuminance treatment room illumination should reach doctors observe and writing requirements should normally be 300lx illuminance above. In addition, natural lighting should be installed better treatment room blinds, interior decoration should avoid direct sunlight summer season important equipment.

Treatment room using cool colors, color rendering index should be equal to or higher than 80 light sources to the spirit and attention. In addition, taking into account the patient supine on the bed there may be facing, the design should avoid direct glare supine patient within visual field, therefore, should be selected with a thin reflective visor of straight tube fluorescent lamps.


check room

Lighting according to general chemical laboratory as part of the body to consider. But consider the color of the light source, even if the low efficiency, should also meet the requirements of light color. The object of the patient examination rooms, as oppressive workplace, consider how to make the patient feel safe and relaxed atmosphere is also very important.

Radiation chamber

Ward lighting, general illumination 100-200lx, pay attention to make up or lying patients will not feel the glare. Single room or double room, lighting can be installed in the bed walls.

When the six-bed room as the beds arranged in two columns, multiple lighting is provided in the middle of the room, which is the location of a patient's eye with light and lighting is necessary for adequate research. General lighting dimming hopes two. In addition to general lighting, is provided at the patient bedside to read and perform everyday tasks bedside lamp.


Department of Surgery

Department of Surgery is intense work in windowless narrow place, continuing a long time carried out. Therefore, operating room lighting must be considered to reduce fatigue-related personnel issues. From the operating room to a range of channels until the ready room, general lighting illumination must be high, the proliferation of good lighting requirements, with a hood, firm structure and no dust.

16 with the number of terms related to LED lighting

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1. luminous flux

According to the standard photometric observer radiation effects derived light measure.

Graphic 16 with the number of terms related to LED lighting


In lumens (lm), 1lm = 1cd / 1sr. For clear vision are:

Graphic 16 with the number of terms related to LED lighting

Where:

dΦe (λ) / dλ-- spectral distribution of radiation flux;

ν (λ) - the spectrum of light (as) efficiency;

Km-- maximum radiation spectrum (depending on) performance, in lumens per watt (lm / W). When monochromatic radiation, Km under photopic conditions is 683lm / W (λm = 555nm time).




2. luminous intensity


Luminous body in a given direction of the luminous intensity is the luminous body transmission within the solid angle element dΩ this direction dΦ flux divided by the solid angle element resulting quotient, per unit solid angle of flux.

The unit is candela (cd), lcd = 1lm / sr.

Graphic 16 with the number of terms related to LED lighting

Graphic 16 with the number of terms related to LED lighting

3. luminance

Brightness refers to (reflector) surface emitting (reflective) physical strength phosphor. The human eye from the light source in one direction, in this direction than the light intensity of the human eye "see" in the area of ​​the light source, the light source unit is defined as the brightness, namely luminous intensity per unit area projected on.

Graphic 16 with the number of terms related to LED lighting

Amount by the formula L = d2Φ / (dA · cosθ · dΩ) defined in units of candela per square meter (cd / m2).

Where:

dΦ-- given point by the beam transmission element and contains the given direction within a solid angle dΩ luminous flux propagation (lm);
dA-- include a given point of the beam cross-sectional area (square meters);
θ-- sectional beam angle between the normal to the beam direction.

4. illuminance

It indicates that the brightness of face to face physical quantity. Light is defined as the point on the surface of the incident at this point where the bins on the ratio of the flux bin area. In value, which is equal to the projected luminous flux per unit area.

Bin containing the incident point on the flux dΦ divided by the surface area dA yuan resulting quotient, the unit is lux (lx), 1 lx = 1 lx / m.

Graphic 16 with the number of terms related to LED lighting

5. average illuminance


The average illuminance on the specified points on the surface.
The average illuminance (Eav) = Total light flux (N * Ф) * utilization coefficient (CU) * Maintenance Factor (MF) / Area (m) (suitable for indoor or stadium lighting calculation)


6. maintained average illuminance

Average illuminance on the specified surface of not less than this value. It is illuminating device must be maintained in the moment, the average illuminance on the specified surface.

7. maintenance factor

In the use of a certain period, the average illuminance on the specified surface or average luminance or average illuminance and the ratio of average luminance of the device under the same conditions when the newly installed on the same surface of the resulting illumination device.
Graphic 16 with the number of terms related to LED lighting


8. distribution of luminous intensity


Denotes a light source or luminaire with a luminous intensity curves or tables in the value space in all directions, also known as light.
Graphic 16 with the number of terms related to LED lighting

9. luminous efficacy of a light source


Light flux emitted divided by the quotient obtained from the power source, referred to the luminous efficiency of the light source. In lumens per watt (lm / W).
Graphic 16 with the number of terms related to LED lighting


10. luminaire efficiency


Under the conditions of use prescribed ratio of the total flux within the total luminous flux emitted by the lamp and the lamp all light emitted, also known lamps light output ratio.
Graphic 16 with the number of terms related to LED lighting


11. luminaire efficacy


Under the conditions of use prescribed, total luminous flux emitted by the lamp and its ratio of the power input. In lumens per watt (lm / W).
Graphic 16 with the number of terms related to LED lighting



12. luminous flux maintenance

In the light source to the light flux given time after their initial flux ratio.




13. reflectance


Incident radiation in the spectral composition, polarization state and the geometric distribution at a given state, the ratio of reflected radiation flux or luminous flux to the incident radiant flux or luminous flux.


14. lighting power density (LPD)


Usually installed power per unit area lighting (including light, electricity ballasts or transformers and other ancillary devices), in units of watts per square meter (W / m).

15. room

It represents the geometry of the room or place value, a value of twice the area of ​​the room or place a room or place horizontal and perimeter lighting installers height difference between the height of the work surface.

16. annual lighting exposure
Objects accepted measure cumulative illuminance values, with object illumination and receiving cumulative hours of product expressed in units of hours per year lux (lx · h / a).

5730 Warm White lamp beads parameters

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5730 warm white SMD LED beads features:

● low power, less heat, saving cooling costs

● high thermal conductivity material having a low resistance, small size, good heat dissipation

● high current (60-150mA)

● Excellent weather resistance temperature

● light uniformity, wide viewing angle

● meet the red ink seepage experiment

5730 warm white SMD LED beads main parameters:

Power: 500mw

Forward Current: 150mA

Forward Pulse Current: 500mA

Reverse voltage: 5V

Operating temperature: -40 ℃ ~ + 80 ℃

Storage temperature: -40 ℃ ~ + 80 ℃

5730 warm white SMD LED beads structure:

5730 warm white SMD LED beads unique advantages:

1. High brightness, low attenuation, low energy consumption, long life, strong anti-static capability

2. High luminous efficiency, narrow spectrum, good color

3. high color display vivid colors and excellent color reproduction capability

4. Green. Does not contain lead, mercury and other toxic substances

5. has the most advanced production equipment and sophisticated packaging process (for details see our photo album and dynamic)

6. The strength of the manufacturers, with a high-quality professional R & D team

5730 warm white SMD LED beads of applications:

5730 lumens white SMD LED beads, stable performance, color consistency, and cost-effective; for a variety of LED lighting products. Widely used in LED lamp, LED bulb, outdoor billboards, electronic displays, traffic lights, signs, automobile taillights, LED light module, LCD backlight, LED lighting, LED flexible light strip.

Detailed Special Purpose LED different bands

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1.(UV LED):
(1) Low UV: 250nm-265 nm -285 nm -365 nm, we are now able to do 250 nm -410 nm. These are INGaN / GaN material carbide. These UV can kill all bacteria in water, its lethality up to 98%, particularly 285 nm.

(2) ultraviolet light: 365 nm -370 nm according to all internationally accepted, UV lethal, surgery requires general practitioners to ensure that without bacteria. 365nm-390nm UV is generally used to fill the dentist, which is characterized by: strong function, time is short. At the same time, the international community used to identify the authenticity of banknotes with a wavelength of 365nm-370nm.


(3) High UV: 405 nm -410 nm, the maximum wafer is less than 2 inches (also known as ultraviolet wafer). From 345-410nm may be used for seed cultivation. Also useful 405nm-410nm is used to identify the authenticity of RMB banknotes.

2. (Visible LED):

(1) Blu-ray: 430 nm -450 nm -470 nm note applies to blue band, whose main ingredient is INGaN / GaN, but its content is low, low capacity, not durable, mainly used for the blue band.


(2) Green: 505 nm -520 nm -540 nm is mainly used for the green band, the main component: INGaN / GaN. The main component is the 556: GaP / ALInGaP, spectroscopy in the international human eye which is most clearly pure green.


(3) yellow light: 570 nm -590 nm band is mainly applied as amber (yellow)


600 nm -620 nm band of the main application as an orange


(4) Red: 630 nm -640 nm band is mainly applied to red, 660 nm -730 nm band length, the main application for the deep red.

3.(infrared LED):

From a medical point of view, using the 660 nm -730 nm -780 nm light promotes plant growth.

730nm-760nm of the finished product can be made medical check whether the patient is in a vegetative state

760 nm-790nm-805nm is used for detecting the content of fat in medicine.

850 nm -880 nm for detecting the engine speed.

900 nm is mainly made of testing equipment for the detection of human blood and blood sugar

940 nm is mainly made remote controller for a position fix.

1000 nm -1300 nm -1500 nm -1550 nm detection instrument is mainly made of highly volatile gases detected human alcohol / fiber / carbon monoxide / carbon dioxide.

Also some special bands for special purposes:
(1) 250 nm -300 nm (0.1MW), 350 nm -360 nm (1MW), 380 nm -400 nm (5MW, 20MA). The product consists of 320nm ~ 400nm excitation band light photocatalyst, can effectively eliminate the office air formaldehyde, benzene, xylene and daily office airborne viruses, bacteria, odors, prevent transmission of the virus and reduce the spread of disease. At the same time it can promote metabolism, enhance immunity, let's energetic, healthy family.

(2) 570-580 nm wavelength, causing mosquito retinal blur it automatically escape.

(3) 320nm ~ 380nm UV can promote skin metabolism, strong growth on the skin, skin thickening, but also the treatment of psoriasis (psoriasis), vitiligo, etc; can be used to illuminate a strong fluorescence lighting effects; also It is used for industrial radiation detection, chemical composition phase, paper money.

(4) 275nm ~ 320nm UV; solarium physiological effects on the human body is strong, he can cause skin and spot photochemical process, so that the skin to produce a lot of active substances on the human body organs, nervous system, endocrine system, circulatory system can play good effect; after sun body irradiation caused skin redness, erythema effect, on the other hand there are 7-dehydrogenation of cholesterol in the skin ergot converted to vitamin D3 or D2, promote the body's normal calcium and phosphorus cycle, the staff the room, pregnant women, children and other particularly important.

(5) the use of 360nm in insect vision near ultraviolet region has the greatest sensitivity characteristics; be able to kill the insect attractant together

(6) 315nm wavelength specific physiological effects of UV-B on animals stronger, animal offal, normal operation of the nervous system, endocrine system, circulatory system, can play a positive role in promoting the synthesis of protein and vitamin D3.