Detection and analysis of blue light hazard in LED lighting products and analysis of blue - rich

Recently, medical experts worry that LED blue light will cause damage to the retina, and even blindness. The news on the Internet caused widespread concern and a large number of users to forward comments, but also led to a high degree of concern of the light source experts. The day before, the Shanghai Municipal Bureau of quality supervision inspection agency specialized organizations on the part of LED lighting products for the risk monitoring, the blue light hazard detection 27 samples collected from different sources. At the same time, the Council also for the first time cross-border invited the medical profession, universities and industry experts together consultation, listen to the views of all parties.

The national electric light source quality supervision and Inspection Center (Shanghai) deputy director Professor of engineering, Shanghai times lighting equipment testing Co., Ltd. deputy general manager, Shanghai lighting association director Yu Anqi of the LED blue light hazard detection is analyzed in detail, and released "detection of LED lighting products and rich blue blue light hazard analysis the analysis and suggestion of" one article. In this article, Yu Anqi mentioned that the blue light hazards and rich blue lighting effect is not only the LED lighting products, before some of the metal halide lamp and some fluorescent lamps already exist.

In addition, Yu Anqi Wen stressed that the blue light is an important part of composition of white light, so under normal circumstances to filter out the blue light is one-sided, when people choose according to physiological rhythm of light components and quality, it is right. In order to avoid the possible adverse effects on the human health due to the use of high color temperature rich blue LED lighting products, indoor LED lighting products should not exceed 4000K color temperature, the general color rendering index should be more than 80. Indoor lighting should avoid the use of color temperature 5000K and above LED lighting products. At present, the promotion of low color temperature LED product technology and cost has been fully feasible.

With the development of science and technology, all kinds of lighting sources are emerging. These light sources can be used to enrich the lighting products and meet the needs of people. For example, the spread of a wide LED blue light hazards, the actual situation in the end is how to determine? According to the international standard for LED lighting products will not produce blue light hazards, lighting the "rich blue", on people's physiology will produce what kind of impact? LED lighting in the development stage. We should have more in-depth research, in order to make the industry more healthy.

Detection and analysis of blue light hazard

According to the existing LED products may harm blue LED lighting products on the market, understand the blue light hazard situation, Shanghai city quality supervision and Inspection Institute of Technology / Shanghai times lighting equipment testing Co., carried out the detection of LED lighting products, detection and correlation analysis are as follows:

1 source and composition of samples

(1) sample source

The total number of samples tested was 27, respectively:

-8 samples are purchased in small informal stores;

-5 samples were purchased in large supermarket;

-14 sample is a large and medium sized manufacturing enterprises.

(2) sample composition

In 27 samples, 8 LED lamp, 7 LED lamp, 9 LED lamp, 1 LED and 2 LED light bulb.

2 purpose and basis

Detection and evaluation of LED lighting products for retinal blue light hazards.

Detection and classification criteria: GB/T 20145-2006 lamps and lamp systems for Biosafety

Hazard determination based on documents: IECEE CTL (International Electrotechnical Commission - Laboratory Committee) resolution: DSH 0744

3 blue light hazard level and corresponding requirements

(1) blue light hazard level

According to the GB/T 20145-2006 blue light retinal damage can be classified as:

(1) no dangerous radiance less than 100 W - m-2 - SR-1): there is no scientific basis for hazard classes is a lamp for this standard under the extreme conditions does not cause any light of biological hazards;

2) low risk (Class 1) (radiance is less than 1 * 104 W - m-2 - SR-1): in a limited exposure under normal conditions, light does not harm;

3) in danger (2) (radiance is less than 4 * 106W - m-2 - SR-1): the lamp does not produce of high light and temperature does not reflect the harm.

4) high risk (Class 3) (>4 x 106W x SR-1 x m-2): lamp in a short instant cause harm.

(2) the corresponding judgment requirements

According to IECEE CTL resolution DSH 0744:

1) brightness is less than 10000cd/m2, and only when the visible light, do not need to press GB/T 20145-2006 hazard classification, can be classified as no danger level, can be used directly. If the brightness is greater than 10000cd/m2, it shall be treated in accordance with the following 2 or 3.

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