I've written about Seasonal Affective Disorder (SAD), a type of depression that is triggered by different seasons. A small amount of people are affected by the late spring and summer, but many more are laid low by winter. What if, however, you don't have SAD per se, but are someone with depression whose depression is exacerbated by the fall and winter darkness? Granted, when you have depression you're frequently unaware of the weather. The most brilliantly sunny day with soft breezes can leave...