LED lantern hurt eyes? How to choose LED lamps

Semiconductor lighting (LED) as a new type of high efficiency and green lighting, is gradually into the homes of ordinary people. However, the particularity of the manufacturing process, so that the LED light has a strong blue light. Online rumors, if the blue light content exceeds a certain limit, it may have a negative impact on the human visual and biological rhythm. So, the market on the LED lamps will not cause harm to the human body? How to choose a safe and reliable LED lamps?

Shanghai semiconductor lighting Engineering Research Center for inspection and evaluation of Qian Wenlei, the so-called blue, refers to the visible light wavelength at 435 nm to 480 nm sections. Due to the current market LED lamps are the most commonly used technical program is "blue chip + yellow phosphor", making the LED light blue content is relatively high. Medical research shows that too much blue light will cause retinal photochemical damage, but also affect the secretion of melatonin, disrupting biological clock.

But this does not mean that the LED lamp lamp more than other eye injury. In the experts to do the experiment, the same color temperature of LED lamps and energy saving lamps. The so-called color temperature is the most common indicator of the quality of the light source spectrum. Ordinary people say warm light, color temperature is lower, and the cold light color temperature is relatively high. After the color temperature increases, the proportion of blue radiation increases, resulting in an increase in blue light. Another factor affecting the proportion of blue light is brightness, in general, the same color temperature fluorescent lamps and LED lights, as long as the latter's brightness is not more than 3 times the former, basically no harm. However, the individual is too bright LED lamps, the proportion of blue light may exceed the safety value. Fudan University electric light Research Institute deputy director Zhang Shanrui said, with the LED technology matures, manufacturers no longer need to blindly improve the lamp color temperature and power flow to achieve high brightness, the objective is also to reduce the possibility of excessive blue.

In fact, whether it is LED lamp, energy-saving lamp, or use the bathroom "Yuba", there may exist the problem of excessive blue. At present, the international light source for the safety of light has a unified standard, Zhejiang University professor Mou Tongsheng, said the Department of optics, China's latest standards will also be released in 2014. As long as the strict implementation of the relevant standards for the production of LED lamps, the general public can rest assured to buy. According to reports, the industry has a set of blue light hazard rating system. The most secure for the 0 level, that is, the lowest blue light content. The highest risk is level 3. General indoor use of LED lamps are in the 0 - level range, and more than 2 lamps in the future will be marked with a label.

For citizens to buy Lamps, experts have weapon. For example, the purchase of LED indoor lighting, try to choose a diffusion mask or diffusion plate, can not see the chip, direct light not too concentrated; Yuba purchase, the best choice of color temperature is higher than that of 2200k (Kelvin), in general, "tubular" than "bulb" shape of Yuba Yuba color temperature is lower, the safety coefficient of blue is also higher.