Bright Light Therapy in Seasonal Affective Disorder (SAD)

Inclusion Criteria: • a patient has (according to the Diagnostic and Statistical Manual of Mental Disorders, fourth edition, text revision \[DSM-IV-TR\]) a Major depression, recurrent episode, seasonal pattern, "moderate" or "severe" (classification code 296.32 and 296.33) The 29-item Structured Interview Guide for Hamilton Depression Rating Scale - Seasonal Affective Disorder Version (SIGH-SAD) score ≥ 20 * The 29-item Structured Interview Guide for Hamilton Depression Rating Scale - Seasonal Affective Disorder Version (SIGH-SAD) score ≥ 20 * The 21-item Hamilton Depression Rating Scale score ≥ 10 * The 8-item atypical symptom score ≥ 5 * 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 * patients has some unstable somatic disorder * patient uses some 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 via ear canals during the current episode