Check this out. There are a lot of articles about this on the net. As someone who suffers from SAD, I look for anyway I can to cope.
http://www.dailymail.co.uk/health/a...r-Shining-light-ear-brighten-winter-mood.html
http://www.dailymail.co.uk/health/a...r-Shining-light-ear-brighten-winter-mood.html