Light therapy is a way to treat seasonal affective disorder (SAD) by exposure to artificial light. Seasonal affective disorder is a type of depression that occurs at a certain time each year, usually in the fall or winter.
During light therapy, you sit or work near a device called a light therapy box. The box gives off bright light that mimics natural outdoor light.
Light therapy is thought to affect brain chemicals linked to mood, easing SAD symptoms. Using a light therapy box may also help with other types of depression, sleep disorders and other conditions. Light therapy is also known as bright light therapy or phototherapy.
March 20, 2013
- Gabbard GO, et al. Gabbard's Treatments of Psychiatric Disorders. 4th ed. Arlington, Va.: American Psychiatric Publishing; 2007. http://psychiatryonline.org/content.aspx?bookid=4§ionid=1337596. Accessed Feb. 19, 2013.
- Shirani A, et al. Illuminating rationale and uses for light therapy. Journal of Clinical Sleep Medicine. 2009;5:155.
- Howland RH. Somatic therapies for seasonal affective disorder. Journal of Psychological Nursing. 2009;47:17.
- Sivamani RK, et al. The benefits and risks of ultraviolet tanning and its alternatives: The role of prudent sun exposure. Dermatologic Clinics. 2009;27:129.
- Reeves GM, et al. Improvement in depression scores after 1 hour of light therapy treatment in patients with seasonal affective disorder. The Journal of Nervous and Mental Disease. 2012;200:51.
- Rastad C, et al. Improvement in fatigue, sleepiness, and health-related quality of life with bright light treatment in persons with seasonal affective disorder and subsyndromal SAD. Depression Research and Treatment. http://www.hindawi.com/journals/drt/2011/543906/. Accessed Feb. 19, 2013.
- Roecklein KA, et al. Cognitive and behavioral predictors of light therapy use. PLOSone. 2012;7:e39275. http://www.plosone.org/article/info:doi/10.1371/journal.pone.0039275. Accessed Feb. 19, 2013.
- Privitera MR, et al. Light therapy for seasonal affective disorder in a clinical office setting. Journal of Psychiatric Practice. 2010;16:387.
- Menter A, et al. Guidelines of care of the management of psoriasis and psoriatic arthritis. Journal of the American Academy of Dermatology. 2010;62:114.
- Hall-Flavin DK (expert opinion). Mayo Clinic, Rochester, Minn. Feb. 26, 2013.
- Auger RR (expert opinion). Mayo Clinic, Rochester, Minn. Feb. 25, 2013.