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Those assigned to bright light therapy were made to sit in front of a fluorescent light box that produced extremely bright white light at an intensity of 10,000 lux for at least 30 minutes daily ...
SAD lamps, or light boxes—which, to be effective, should emit 10,000 lux, the amount of light you’d see on the horizon at sunrise—are widely available in a range of sizes and prices ...
Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, and skin wound infections.
Seasonal affective disorder (SAD) is a mood disorder subset in which people who typically have normal mental health throughout most of the year exhibit depressive symptoms at the same time each year. [ 1 ] [ 2 ] It is commonly, but not always, associated with the reductions or increases in total daily sunlight hours that occur during the winter ...
The lab developed “10,000 lux bright light therapy,” which became the standard regimen for brief morning light treatment to reset the internal clock at an earlier position in the 24-hour day. The method has been extended to treatment of nonseasonal depression, bipolar depression and depression during pregnancy. [ 5 ]
Norman E. Rosenthal is an American author, psychiatrist and scientist who first described seasonal affective disorder (SAD), and developed light therapy as a treatment. Rosenthal was born and educated in South Africa but moved to the United States to complete his medical training.
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