LED lamp
, but because it is from 50 Hz AC direct light, so the brightness of 100 times per second, the frequency of non-stop change, this is the stroboscopic phenomenon. Long hours under fluorescent lights flashing constantly learning, the eyes will feel tired. Incandescent light emitted compared with the natural light reddish rather than white light, this light will be black and white contrast of objects according to be reduced at the same time, as the light source, easy to produce harmful glare on vis
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11/10 22:46