Light Therapy for Depression in Adolescent Outpatients

The active light box is a white fluorescent 4000 Kelvin unit that emits 10,000 lux and measures 33cm x 40cm. The placebo box emits 50 lux dim red light and appears identical to the active unit. Subjects were instructed to position themselves 30-36 cm from the box with their faces fully exposed to the light. The actigraphy device is a Phillips Spectrum Plus Actigraphy watch which collects activity level and sleep information along with multiple light measurements and wearer adherence.