Study desk lamp high-power led is more appropriate
LED lamp general 6/7 w is very bright, is too light is bad for your eyes
Preferred the desk lamp of dc, because traditional 220 v ac 50 hz residual current fluctuations, causing light stroboscopic phenomenon. Stroboscopic is easy to cause eye fatigue, vision loss, deepen myopia. And preferred light yellow light, the light is warm, warm and comfortable, stable, not dazzling. Another is to see whether there is ultraviolet (uv) radiation.
Hello, choose close reading and writing desk lamp must choose protect eyesight! LED lamp cannot be used as close to read and write operations, because leds emit short-wave high-energy light - blue light, can be directly through the cornea and lens, can direct the macular area, cause burns to the retina. Whether a desk lamp eye health mainly judging from three aspects, one is no stroboscopic; The second is the light right; Three is no uv radiation.
