From the
American Psychological Association's website (apa.org):
http://www.apa.org/research/action/light.aspx
I'd also try clicking the more recent info from the
National Institutes of Health (
http://www.nimh.nih.gov/news/science...-rhythms.shtml). These are both legitimate organizations, with good information about the topic. Once inside their websites, you can probably find lots of other information. If not, just Google "Seasonal Affective Disorder" (SAD) and see what comes up.
Bottom Line:
"SAD" is a real affliction, and there is a very effective treatment for it: More light. But certain types work better than others, and certain times of day work better also. A few people have posted links to places you can purchase these lights, but I'd check with a behavioral psychologist for advice before doing so.