Research Study of Treatment for Winter Depression With Different Colors of Light

Inclusion Criteria: * Clinical diagnosis of Seasonal Affective Disorder * Over 18 years old * Stable sleeping pattern with a bedtime no later than 1 a.m. Exclusion Criteria: * Pregnant women * Concurrent psychiatric illness that would preclude compliance with the protocol * active suicidal or homicidal ideation or plan * variable psychiatric illness (i.e. rapid cycling disorder or severe premenstrual syndrome) * individuals with substance abuse or dependence who have not been in remission for at least one year * individuals taking photosensitizing medications * individuals with macular degeneration or other ocular conditions which might be adversely affected by light * less then six weeks after onset of psychotherapeutic treatment