Rumor! LED lights are not installed in a few seconds to cover the scattering can be blind?

A recent "CCTV exposure LED lamp is not installed diffusion cover tens of seconds can cause blindness" the news caused the attention of people, it is reported that the news is based on the CCTV program "first time" broadcast "the truth report: LED can damage the eyes? "Program, but too interpret out of context.

From the show interviewed experts, the national electric light source quality supervision and Inspection Center (Shanghai) deputy director of Engineering Professor Yu teacher An Qi's article "detection of LED lighting products blue light hazard analysis and rich blue analysis and recommendations" in the article, we can learn in detail: blue light hazard and "rich blue" the lighting effect is not only some LED lighting products, metal halide lamp and fluorescent lamp before some already exists.

Yu Anqi teacher "LED lighting products blue light hazard detection and analysis and the analysis and recommendations of rich blue":

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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