Winter can be very depressing, especially if you are not going outside or getting enough UV light. I don't find that the winter bothers me, I never get sick with regular colds or anything but I do find if I don't get enough outside time or time with my plants under grow lights (uv) as well as an ott light that provides "natural" light I get depressed. This usually only happens in the winter when I don't get outside enough, however if I am able to spend more time outside I feel much better.