100w basking lamp for reptiles: $8.00
Workbench clamp light, good for 150w: $8.00
Lessening the symptoms of two people with Seasonal Affective Disorder without having to pay five hundred dollars for a lightbox or stop playing their boardgame for the time of treatment: Pretty damned spiffy.

Seriously, it's a bare-bones setup, but it works. I clamped it to the rack above the window we use to put bills in and shine it at an angle across the kitchen, and the extra heat and light really make a difference in both she and I's mood. It's bright enough that you can't look at it directly and that seems to be enough to fool the bit of our brain in charge of measuring how much sunlight we get. I really recommend anyone who gets down about the short days give it a try.