Yes. My mood always tanks at predictable times of the year. When that happens, old pain resurfaces even when those traumas don't impact my life as much at other times of the year. Then it all feeds on itself and goes down down down. I thank the others on this post for saying the artificial lights don't help because I was thinking of getting one. When weather cooperates, natural light sometimes helps a little. Indoor plants help me, and listening to nature sounds and looking at pictures of natural scenes. Motivation for working out gets harder when I feel like this but the physical activity really helps. So do power poses even though it seems silly. None of this gets me to 100% but it gets me through enough to function. If I don't do these things, I feel the urge to hide under the covers and not come out. I hope some of these suggestions can help you.