Bright white light therapy has been used to treat seasonal affective disorder (SAD) for more than 20 years. Although it remains a mainstay of treatment, in the past few years researchers have investigated ways to improve and refine light therapy, reports the November 2008 issue of the Harvard Mental Health Letter. Improvement…

Some people suffer from symptoms of depression during the winter months, with symptoms subsiding during the spring and summer months. This may be a sign of Seasonal Affective Disorder (SAD). SAD is a mood disorder associated with depression episodes and related to seasonal variations of light. SAD was first noted before 1845,…