White LED light-emitting diodes with a color temperature of about 3000K are safe for indoor use.
LED light-emitting diode is a very good light source, but there are some people who misunderstand that LED light-emitting diode is harmful to the human eye a professor engaged in LED light-emitting diode research said: our family does not use white LED light-emitting diode light source, not that I don't want to use, mainly my wife doesn't want to use, she thinks that LED light-emitting diode may be harmful to the human eye, so very much opposed to the use of LED light-emitting diode.
Lighting not only produces visual effects, but also produces biological effects. Why do we get up later in winter and earlier in summer? This is actually the light controlling our biological clock. When the blue light is very strong, people have no desire to sleep; on the contrary, when the blue light is very weak, it is conducive to human sleep. So blue light will have an effect on human biological rhythm. Now most of the white LED light-emitting diodes are using blue LED light-emitting diodes to excite the YAG phosphor in a way that the peak wavelength of blue light radiation has a relatively large overlap with the retinal blue light damage characteristic curve and the human body's non-visual photoreceptor curve. In this way, the use of white LED light-emitting diodes indoors there is a concern that it will harm the retina and disrupt the biological clock.
Professor Van Bommel, former Chairman of the International Commission on Illumination (CIE), in an article entitled "Lighting Quality and Energy Efficiency" (Lighting Quality and Energy Efficiency), focuses on analyzing the impact of blue light from LED light-emitting diodes on people. After careful calculations, he obtained the result that white LEDs with a color temperature of 2700K and a color rendering index of 80 or more emit less blue light than incandescent lamps that produce the same amount of luminous flux. He believes that the color temperature 2700K ~ 3000K, and color rendering index of 80 or more white LED light-emitting diodes, can be safely used indoors.
In addition, the People's Liberation Army Air Force General Hospital, Department of Dermatology, Dr. Tian Yan, a related report, mentioned in the report, now, the CCTV news studio has used LED light-emitting diode lighting. In the CCTV studio LED light-emitting diode lighting research project, Dr. Tian Yan invited more than 30 volunteers to accept a period of 30 days of irradiation experiments, lamps and lanterns using LED light-emitting diode light source, the test selected illuminance for 2800lx, irradiation time of 15 minutes, irradiation once a day, irradiation for 30 consecutive days. The results found that the volunteer skin color changes in no statistically significant difference, that is, in the LED light-emitting diode lamp illumination of human skin color did not produce changes; in addition, LED light-emitting diode light source on the skin stratum corneum water content and TEWL and so on have no significant effect. The experimental results demonstrate that LED light-emitting diode lighting is safe for the skin.
Also for white LED light-emitting diodes, she conducted comparative experiments. The results show that fluorescent lamps may cause damage to the skin in the long term. First of all, the indicators of skin color changed; skin color became black and red; at the same time, the water content of the stratum corneum has a tendency to decline; and when the irradiation dose increases, the skin's tissue structure has also undergone some changes.