Bright Light Therapy in Seasonal Affective Disorder (SAD)

Inclusion Criteria: * a patient has, according to the DSM-IV-TR, a Major depression, recurrent episode, seasonal pattern, "moderate" or "severe" (classification code 296.32 and 296.33) * HAMD-21 (included in the SIGH-SAD) sum score is ≥ 22 * patient is over 18 years * patient can read and understand the subject information sheet * patient has signed the informed consent form * patient is not pregnant Exclusion Criteria: * patient has a lifetime psychotic disorder * patient has a DSM-IV Axis I disorder other than some anxiety disorder evaluated by MINI * patient has some DSM-IV-TR Axis II disorder, which is likely to interfere with the study treatment according to the investigator * patient has alcohol or some other substance use dependence or misuse * life-time suicide attempt, or any thought of suicide during the last month * patients has some unstable somatic disorder * patient uses some medication on regular basis * patient uses some herbal psychotropic agencies * patient is, in the opinion of the investigator, unsuitable for any reason * patient is a member of the site personnel or their immediate families * patient has had bright light therapy during the current episode * patient has some eye disease (patient can, however, be myopic or hyperopic)