LED blue light damage three types of experts recommend caution

Despite the LED blue light damage, the industry and experts are not exactly the same. But there is no dispute at all, that is, the illumination of the LED is rich in blue light. Member of the International Committee on Standardization of Optical Radiation Safety and Professor of Zhejiang University, Tong Tongsheng, reminded that there are three types of people who should be used with caution. The first category, which everyone wants, is a child with delicate eyes. The other two types of people are generally seldom known:

[Diabetes after more than a decade of development, there are lesions of the retina, the value of the retina to bear light damage is greatly reduced, as well as drugs, many drugs in our lives are photosensitive, after we take the medicine, the damage of light May be more obvious. 】

The reporter interviewed medical experts and learned that there are no less than 20 kinds of photosensitizing drugs. Among them, doxycycline, ciprofloxacin and oral hypoglycemic agent D-860 are more commonly used. After taking these medicines, patients should be cautious not only with lights, but also with the sun.

In the discussion, there is another term that is frequently mentioned by everyone, that is, "color temperature":

[LED energy saving is energy saving, but it is forbidden to do very high color temperature. (Indoor, the color temperature will drop.)

The so-called color temperature is a measure of the color of the light source. The low color temperature is the warm light we usually say, with more red components and less blue components. On the contrary, the blue color of the cool color, the color temperature is relatively high. Among our common light sources, the color temperature of candlelight is about 2000K, the incandescent lamp is 3000K, the morning sun is about 4400K, and it rises to 5600K at noon. Yu Anqi, senior engineer and chairman of the Shanghai Lighting Society, said that people use light at different times of the day, and it is ideal to comply with the laws of nature. Now the LED lights on the market are generally high in color temperature, which will cause interference to the human body clock:

[Most of the household lights are at night, need low-color temperature lighting, this time measuring the color temperature of 27 products, seven samples are much higher than 6500K, even more than 100,000 K, has exceeded the white light of lighting products The upper limit of color temperature, long-term use, will affect sleep, and it will become a disorder of the biological clock, thereby reducing human immunity. 】

At this point, consumers know too little! The reporter repeatedly looked at more than a dozen lamps, and the color temperature of the light was not indicated on the outer packaging. Two are only marked on the instructions. Experts have called for the state to stipulate how much the color temperature of the lighting products should be clearly marked on the outer packaging. Professor Zhang Haijun, chairman of the China LED Lighting Forum, said that consumers should avoid a misunderstanding, that is, the brighter the light, the better. LED luminaires are best equipped with a lampshade. On the one hand, the light can be softer. On the other hand, the test proves that this can reduce the blue light overflow by one to two orders of magnitude:

[In order to improve the light efficiency, many manufacturers use unscrupulous means. The most obvious one is the light tube. Many of them are bare ones. This is uncomfortable for people. There is a cover underneath the desk lamp, and the thorns are turned into no thorns. 】