Sun lamps, also known as SAD lamps or phototherapy boxes, are special lamps that mimic natural outdoor light. Light therapy, sometimes called bright light therapy, is an effective treatment for seasonal affective disorder (SAD). SAD is a type of depression that occurs in the fall and winter when there are fewer hours of sunlight.
Light from sunlamps is thought to have a positive effect on serotonin and melatonin. These chemicals help control your sleep and wake cycles. Serotonin also helps reduce anxiety and improve mood. Low serotonin levels are associated with depression.
Sun lamps are generally considered safe because they do not emit UV radiation. If side effects do occur, they are usually mild and go away on their own within a few days. Some people may have increased sensitivity to light due to certain diseases, such as macular degeneration, lupus, or connective tissue disease.
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