Day and night are a natural cadence of life. For centuries before the electric light was created individuals needed to live to a great extent by the natural patterns of light and dim. It is not out of the ordinary thus that the human body has utilized these cycles. In manners that energize well-being and that differing from them too far might have negative outcomes. It appears this is the situation. Sleep issue, wretchedness and in any event. Maturing and disease are a portion of the conditions that are influenced by poor “light cleanliness”.