LED street lights harm your health?

Apple Daily reported that china outdoor street lamp have become popular in recent years, but the American Medical Association (AMA) recently issued a formal statement warning that if LED street lights are too white and too bright, they will release a lot of blue light, and people will be exposed to them, not only when driving. The glare increases the chance of a car accident, and the sleep cycle may also be affected.

CNN and National Public Radio (NPR) reported that the AMA unanimously adopted a statement at the meeting to provide guidelines on how to choose LED roadway street lights. The purpose is to reduce the damage of LED street lights to human health and environmental effects. To the lowest".

AMA recommends that, first of all, AMA supports "reasonable replacement of public light sources with LED light sources, which will save energy and reduce the consumption of fossil fuels."

Second, AMA "encourages the reduction and control of light sources that emit a large amount of blue light, and encourages the use of light sources that emit the least blue light to reduce dazzling damage."

For a complex problem, there is often no perfect solution. We must illuminate the night, not only to illuminate homes and offices, but also to illuminate outdoor streets. Improving energy efficiency is a serious matter, but at the same time, reducing the risk of bad light sources harming the human body, including dazzling and circadian clock disturbance, is also very important. LED technology can improve both through reasonable design.

Third, AMA “encourages the use of light sources with a color temperature of 3000K or lower in outdoor facilities, such as highways. All LED lights should have appropriate shielding to reduce dazzling damage and reduce adverse effects on the human body and the environment, and should This enables public administrations to reduce the brightness of LED lights during off-peak hours."

How to choose the best LED street light?

1. The LED brightness (MCD) is different, and the price is different. The LED used in the LED lamp should meet the laser class Ⅰ standard.

2. The LED with strong antistatic ability has long life and high price. Generally, LEDs with anti-static power greater than 700V can be used for LED lighting

3. LEDs with the same wavelength have the same color. If the color is required to be the same, the price is high. It is difficult for outdoor street light manufacturers without LED spectrophotometers to produce products with pure colors.

4. Leakage current LED is a unidirectional conductive light-emitting body. If there is a reverse current, it is called leakage. LEDs with large leakage current have short life and low price.

5. LEDs with different light-emitting angles have different light-emitting angles. Special lighting angle, higher price. Such as full diffusion angle, the price is higher.

6. The key to different quality of life is life, and life is determined by light decay. Low light decay, long life, long life, high price.

7. Chip LED's light-emitting body is a chip, and the price of different chips varies greatly.

8. Chip size The size of the chip is expressed by the side length. The quality of the large chip LED is better than that of the small chip. The price is proportional to the size of the chip.

9. The technology is becoming more and more mature, and the high-power LED light source can already meet the needs of general street lights. The luminous efficiency of the general high-pressure sodium lamp is 100LM/W, and the commonly used high-power LED is 50-60LM/W. It can reach 80LM/W with foreign LED chips. The higher the luminous efficiency, the better the energy-saving effect. This is also the choice One of the most important indicators of china Led roadway lighting. However, there is no clear stipulation in the LED standard, so you must carefully confirm when purchasing LED street lights.

10. In order to reduce costs, some businesses use hundreds of low-power LEDs of 0.5W. However, the light decay of this low-power LED is very serious, and its light decay to 80% has a life span of only 1000 hours. Therefore, as a street lamp that needs to be used for a long time, it is absolutely not allowed to use such low-power LEDs. If you choose high-power LEDs (generally more than 30W), the light decay will be much better.

11. Due to the high technical content and complex composition of LED street lamps, the weight of some high-power lamp holders will far exceed that of ordinary high-pressure sodium lamps, so the requirements for corresponding supporting materials are higher. However, some LED street lamp manufacturers have tried their best to reduce the self-weight of the LED lamp holder, from about 30 kg per lamp holder to more than 10 kg, and the weight reduction has a further downward trend.

12. Because LED is a semiconductor component, when its chip is affected by temperature and reduces to 30% of the initial luminous flux, it will lose its illumination meaning, that is, the end of life. In theory, the life of high-power LED street lights is 30,000 to 50,000 hours. , But its important prerequisite is good heat dissipation. It is worth mentioning that domestic manufacturers have adopted the world's leading needle-shaped heat dissipation technology.