 Twenty-four depressed SAD outpatients will be randomized to a 3-week trial of light therapy using either the narrow 468 nm LED source or the broader 400-700 nm LED source, each housed in a GoLITEÔ device. Subjects will be given devices and written instruction for administering daily treatments at home, 45min every q a.m. The devices will be described to subjects in terms of wavelength but not specifically described as blue or white. Weekly depression ratings and assessments of adverse effects will be obtained by a trained rater blind to the treatment condition. Depressive symptoms will be rated weekly by the same trained clinician. 