[ObjectivelTo observe the clinical efficacy and adverse reaction of light therapy for the treat- ment of mild depression. [MethodslA total of 59 patients with mild depression in our hospital from Jan. 2010 to March 2011 were chosen and randomly divided them into observation group( n = 30) and control group( n = 29). The observation group was treated with 10000 Lux light therapy, while control group was treated with 100 Lux light therapy. Each group was treated 30 minutes every day. The treatment duration was 6 weeks. Hamilton rating scale f...