Team of Pro. Yandan Lin
--Human Factors Lighting & Color Science Laboratory

Effect of bright light therapy for depression

Yixiao Zhuang;Kun Xie;Yandan Lin,Effect of bright light therapy for depression.2017 14th ChinaInternational Forum on Solid State Lighting: International Forum on WideBandgap Semiconductors China (SSLChina: IFWS), 109-112


Depression is a common mental disease, which affects the quality of life. It can be divided into seasonal affective disorder and non-seasonal depression. It has been proved that light therapy has effective therapeutic effect on seasonal affective disorder, while the effect of light therapy on nonseasonal depression need further verification. In this paper, we  we studied on the effect of bright lighttherapy on non-seasonal depression. The condition of bright light therapies were:evening treatment conducted from 18:00 to 19:30 and morning treatment conductedfrom 8:00 to 9:30. The conclusions were: bright light therapy conducted inevening and morning could lift spirits, lead to the decline of heart rate andblood pressure. Also, for people with non-seasonal depression, evening brightlight therapy was more effective than in the morning (p=0.004<;0.05).Treatment for controlled trial got similar effect of improvement, yet showed nosignificant difference between evening and morning treatment (p>0.05). Thispaper verified the effect of improvement of bright light therapy for peoplewith and without non-seasonal depression. Furthermore, we found an optimumcondition of bright light therapy for non-seasonal depression treatment, conducted from 18:00 to 19:30 with its CCT of 4400K.