Light is essential to all life on earth. Outside of the various psychological & physiological reasons there's a growing body of scientific evidence showing people actually require light exposure to function effectively. Light exposure causes the brain to suppress the release of the hormone melatonin that acts as a depressant in the body and exposure to light produces various health benefits, such as the production of the very necessary Vitamin D3 in the prevention of bone diseases (such as osteoporosis) and in the improvement of symptoms of psoriasis. Indoor tanning offers you a control. Regardless of the time of day or the season of the year you can obtain light therapy and produce Vitamin D in Your skin in a safe & healthy environment.