In early March - or maybe late February - there was an incredibly sunny day and I did my yoga that afternoon in front of our wall of windows with the full, not sun beating down on me. I did a nice long practice, over an hour. When I was done, I *was* manic. I think after weeks and weeks of dark and cold, all that light and heat had very drug-like effects! Which was when I realized that it was me and a light-box next winter, because the effect was SO dramatic.