Lighting the mood of depressed youth: Feasibility and efficacy of a 2 week-placebo controlled bright light treatment for juvenile inpatients

•First pilot study of morning bright light therapy for juvenile depressed inpatients.•Bright light therapy results in enhanced sleep quality and higher morningness.•Improved depression was predicted by better sleep quality and circadian preference.•Bright light therapy is a feasible add-on treatment for depressed adolescents.