Impact of Leds on Health

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 Led effect on  Sleep

In the frenetic fast food ,coffee fuelled lives of today,too many people are having sleep deficency.Modern light emitting diodes used in energy efficient lighting as well as television and computer screens,laptops, tablets and various handheld devices , are adding to this problem. The electric light from these light emitting diodes has a powerful impact on body's clock, known as circadian rhythms ."And light effect this body's clock more than any drug", remarked CharlesA. Czeisler in his perspective article in Nature's outlook feature on sleep.Apart from rods and cones needed for vision,the eye's retina also contain's photosensitive retinal ganglion cells. These photosensitive cells help synchronise the body's circadian rhythm to the natural day and night cycle.When artificial light strikes those cells,the body get misled and respond by prompting wakefulness and inhibiting sleep. White light emitted by light emitting diodes are typically rich in blue light.This mattered because photosensitive were most sensitive to blue and blue green light. So night time exposure to LEDs was more disruptive to circadian rhythms and sleep than the old incandescent light bulbs. Various effects of less sleep on human life are as follows 1) Sleep loss dumb you down Sleep plays a very important role in thinking and learning. Lack of sleep effect these cerebral processes in many ways. first it diminish alertness,concentration, reasoning and problem solving .Thid make it more difficult to learn efficiently. Beside above described, various sleep cycle play a role in "consolidating" memories in the mind. If you don't sleep well enough ,you wont be able to remember what you learned. 2) Sleep loss can cause various health issues Sleep disorder and chronic sleep loss can put you at risk for High blood pressure, Heart attack and Diabetes etc. Since solid state light fixtures could carry mult coloured LEDs, it will be relatively easy to control their light intensity and colour composition.'The adverse effects of night time light on sleep and body's rhythms can be reduced by replacing blueenriched light with red-or orange -enriched white light after sunset".