We all know that excessive exposure to sunlight can cause skin cancer, wrinkling of the skin, and aging of the skin. However, sunlight is very good for our overall health.

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Understanding the power of sunlight is very important. Sunlight intensity is measured in "lux" or "luxes", for example, on a bright sunny day outdoor light can reach three-thousand lux. However, an indoor environment brightly lit will provide only 400 lux. That is less than 15 percent of daylight…