Full spectrum light that imitates natural sunshine is necessary for full physical, emotional, mental and spiritual health. Each color causes a different response. Different colors support metabolism of nutrients, help us to be calm yet alert, happy and not depressed or anxious. Full spectrum light combines all the colors of the rainbow into a beautiful white light.
We have full spectrum lights in spiral bulbs, fluorescent tubes and light boxes for SAD (Seasonal Affective Disorder).
http://www.lightforhealth.com