Light therapy is treatment with a special type of light that is much brighter than a lamp or other light fixture in your home.
Studies vary as to whether light therapy at other times of the day is less effective, but some people with SAD (perhaps those who wake up normally in the early morning) should do their light therapy for 1 to 2 hours in the evening, ending 1 hour before bedtime.
The safest light is fluorescent, not full-spectrum or ultraviolet light.
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