i did consider one of those, but I'm yet to be convinced that it'd help enough to justify the price of the one I was recommended by the doctor which was around £300.
I'd far rather put that kind of money toward one of your guitars ;)
I think that i get depressed by bad vibes more than an actual lack of sunshine, and i don't see how a box emitting fake light would cheer me up. I could be very wrong though