Health effects in the LED light spectrum
1. The content of ultraviolet UV-A is very small, and its influence can be ignored;
2. No UV-B content;
3. The high content of blue light may cause retinal damage, and blue light radiation with a color temperature below 3500K is relatively safe;
4. There is almost no near-infrared content, so there is no need to consider its influence.
LED white light is the white light produced by the mixing of the blue light-producing chip inside the lamp bead and the yellow phosphor covering the chip.
LED lighting has many advantages over traditional light sources, and is the development direction of lighting sources. We have begun to enter the era of LED lighting. However, if we do not pay attention to the impact of blue light in LED lighting on human eyes, it will cause "blue light hazards". Exceeding metal halide lamps and fluorescent lamps, LED light sources with high color temperature will lead to more serious "blue light hazard". "Blue light hazard" is generated without awareness in the lighting environment. Safety can only be guaranteed under scientific use methods; the most important thing What's more, light source producers need to have these basic knowledge.
"Blue light hazard" is a public health issue, and product information should include these contents. Blue light radiation detection of LED lighting sources is the only way to discriminate safe products; it should be noted that LED lighting sources do not necessarily mean "blue light hazard". The amount of radiation and the time of radiation are the preconditions for judging "blue light hazard".
The higher the power of LED lighting products, the higher the blue light hazard. Usually, the LED light source above 20W should pay attention to the installation height when using it. The higher the installation height, the lower the blue light hazard.
The blue light radiation of LED lighting sources decreases with the decrease of color temperature. Low-power LED light sources with a color temperature of 3500K-2800K basically meet the national standards. White light with a color temperature above 6500K has the influence of blue light radiation. It is incredible that LED lighting produced in my country Most of the light sources are products with high color temperature;
With the increase of color rendering, the amount of blue light radiation decreases. The increase in color rendering means that phosphors need to absorb more blue radiation energy and excite a wider spectrum. Therefore, LED lighting sources with high color rendering index Relatively safe.
1. For commercial lighting, it is recommended to use LED white light with a color temperature below 6000K, and the maximum value should not exceed 6500K;
2. For office lighting, it is recommended to use a color temperature between 5000K and 3200K;
3. For home lighting, try to use LED lights with a single lamp power below 8W and a color temperature below 3500K;
4. For lighting LEDs, try to use products with high color rendering;
5. For reading desk lamps, it is best to use LED light sources with high color rendering and color temperature below 3200K and power less than 6W;
