Light box therapy utilizes the natural healing power of light to help treat the symptoms of a wide range of medical conditions. Different colors of light are used for different conditions. Bright light therapy boxes are used to help treat the symptoms of Seasonal Affective Disorder (also known as SAD and seasonal depression). SAD light therapy boxes mimic natural sunlight, causing biochemical changes in the brain that can help elevate mood and activate energy within the body. Blue light therapy boxes can help block pineal melatonin production, naturally regulating the body's sleep cycle without the use of sleeping pills. Red/blue light therapy boxes can be helpful for improving skin health, combining the anti-inflammatory, healing properties of red light with blue light that helps kill acne-causing bacteria.