Companies in the light technology field are confident that these products are helpful, because CirCadian Lighting Association members offer money back gurantees, and don t get many back. There is evidence that brighter light means less use time - but even that isn t conclusive. There is even evidence that very low levels of light, around 600 lux, can have a significant effect. Find the bright light product that fits into your life style and give it a try. This has now been shown to be untrue.
Full spectrum refers to the colors that are contained in white light.
If you have seen a rainbow or looked through a prism, you have seen that white light is actually made up of a blend of several colors. The sun has a certain combination of colors at different brightnesses. Light bulbs that appear white may have different blends of colors. Most flourescent lights only use a few colors. Some people prefer the light from full spectrum flourescent lamps because it feels more comfortable on the eyes.