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 byMINI

• patient has some DSM-IV-TR Axis II disorder, which is likely to interfere with thestudy 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)