Recently, medical experts worry that LED blue light will cause damage to the retina, even blindness. This news has attracted a lot of attention from netizens and a large number of forwarded comments on the Internet, and it has also attracted the attention of light source experts. Recently, the Shanghai Municipal Quality Supervision Bureau organized a testing agency to conduct risk monitoring on some LED lighting products, and collected 27 samples from different channels for blue light hazard testing. At the same time, the bureau also invited experts from the medical, university and industry circles to “consult†for the first time, and listened to the opinions of all parties.
Guo Anqi, deputy director of the National Electric Light Source Quality Supervision and Inspection Center (Shanghai), deputy general manager of Shanghai Times Lighting Lighting Inspection Co., Ltd., and chairman of the Shanghai Lighting Society, Yu Anqi conducted a detailed analysis of the LED blue light hazard detection. And published the "LED lighting products Blu-ray hazard detection analysis and blue-blue analysis and recommendations" article. In this article, Yu Anqi mentioned that the effects of blue light hazard and “blue-rich†lighting are not unique to LED lighting products. Some of the previous metal halide lamps and some fluorescent lamps have existed for a long time.
In addition, Yu Anqi emphasized in the article that blue light is an important part of white light, so the theory of filtering out blue light under normal conditions is one-sided. It is correct to choose the illumination component and quality according to human physiological rhythm. In order to avoid the possible adverse effects on human health caused by the use of high color temperature and rich blue LED lighting products, the color temperature of indoor LED lighting products should not exceed 4000K, and the general color rendering index should reach 80 or more. Indoor lighting should avoid the use of LED lighting products with color temperature of 5000K and above. At present, it is completely feasible to promote the technology and cost of low color temperature LED products.
Advances in technology have led to the emergence of a variety of lighting sources that enrich lighting products and meet people's needs while also causing harm to people due to improper use. For example, the current situation of LED blue light hazard is widely spread. What is the actual situation? According to international standards, LED lighting products that are determined to not cause blue light hazards, their "rich blue" lighting, will be physiologically What impact will it have? In the current stage of LED lighting development, we should have a more in-depth study to make the industry develop healthier.
First, the detection and analysis of blue light hazards
According to the possible blue light hazard of LED products, to understand the blue light hazard of LED lighting products in the market, Shanghai Quality Supervision and Inspection Technology Research Institute/Shanghai Times Light Lighting Electrical Appliance Testing Co., Ltd. conducted a bottoming test on LED lighting products. And related analysis is as follows:
1. Sample source and composition
(1) Sample source
The total number of samples tested was 27, which were from:
-8 samples were purchased from small informal stores;
- 5 samples were purchased from large supermarkets;
-14 samples are test samples for large and medium-sized manufacturers.
(2) sample composition
Of the 27 samples, 8 LED desk lamps, 7 LED spotlights, 9 LED downlights, 1 LED bulb and 2 LED panel lights.
2. Purpose and basis of testing
Detect and evaluate retinal blue light hazards in LED lighting products.
Detection and classification according to the standard: GB/T20145-2006 photobiosafety of lamps and lamp systems
Hazard determination document: IECEECTL (International Electrotechnical Commission - Laboratory Committee) Resolution: DSH0744
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