Nineteen patients with late luteal phase dysphoric disorder (LLPDD) and
11 healthy comparison subjects underwent a 3-month crossover trial of
bright (more than 2500 lux) white morning, bright white evening, and
placebo dim (less than 10 lux) red evening light, administered daily for 1
week during the premenstrual phase of the menstrual cycle. All light
treatments significantly reduced depressive ratings from baseline
levels.Abstract Teaser