Light treatment is an approach to treat seasonal affective disorder (SAD) and certain different conditions by exposure to artificial light. SAD is a kind of wretchedness that happens at a specific time every year, normally in the fall or winter.
Amid light treatment, you sit or work close to a gadget called a light therapy box. The box emits splendid light that emulates common outside light.
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http://listoftech.com/best-light-therapy-sad-lamps/