Nice
I can't say conclusively whether this helps seasonal depression, but I definitely feel more energized and upbeat when sitting at my desk with the light on.  It's little, so I leave it on whenever I am in my office, and since my office is in the basement it really does perk up the place.  I have not fallen into a winter funk this year--how much of this is due to the light, I couldn't say, but I am not about to give it up!  Indeed, I might get one for home too.
Rating: 5 stars