Adjunctive Bright Light Therapy in Adolescents With Depression and Eveningness

This study is testing bright light therapy — sitting in front of a specially designed bright lamp each morning — as an add-on treatment for depression in teenagers who tend to be "night owls" (staying up late and waking late). **You may be eligible if...** - You are Chinese and between 12 and 19 years old - You have been diagnosed with depression (non-seasonal, non-psychotic) confirmed by a structured psychiatric interview - Your depression score on the CDRS-R scale is 40 or higher - You are identified as an "evening chronotype" (a night owl) based on a standard questionnaire - Your parent or guardian has given written consent **You may NOT be eligible if...** - You currently have psychotic symptoms or bipolar disorder - You have a condition that makes bright light therapy risky (e.g., certain eye conditions, taking photosensitizing medications) - You are already receiving another form of neuromodulation treatment Talk to your doctor to see if this trial is right for you.