What is the use of a light therapy device?

Multiple uses: Light therapies can be used for treatment of seasonal affective disorder (sad), a kind of depression that occurs at a certain time of the year, usually in the winter. Also, light therapy or phototherapy (or heliotherapy) consists of exposure to daylight or to specific wavelengths of light using lasers, light-emitting diodes, fluorescent lamps, or dichroic lamps to treat various skin conditions.

Agree with Dr. Smith: As a psychiatrist I will focus on the use of light boxes for Seasonal Affective Disorder. I also find that a number of my patients with major depression respond well to light therapy. See an excellent article by Mayo Clinic on this subject at: http://www.mayoclinic.org/diseases-conditions/seasonal-affective-disorder/in-depth/seasonal-affective-disorder-treatment/art-20048298