Matching Light to Internal Clock Fights Depression
 http://archpsyc.jamanetwork.com/article.aspx?articleid=481701


NEW YORK (Reuters Health) - Bright light treatments may help lift people from the depths of severe winter depression, but new research suggests that timing these treatments to the body's internal clock may improve light's antidepressant affect. The results of the study suggest that light has its most antidepressant effect if used early in the morning. SOURCE: Archives of General Psychiatry; 2001;

se also.... http://bottomlinepersonal.com/light-therapy-not-just-for-wintertime-blues/