I was diagnosed with the light sensitivity thingy when I was working in a building where nobody could see daylight (literally and figuratively). The doctor didn't actually prescribe anything. Just diagnosed it. (Did I mention he was a jerk?) I knew so little about it, I wasn't sure what to do, except a lightbox. And that was impractical. I didn't have time to sit in front of a lightbox. I'd be reading my email at 6 am over breakfast. At work, I was teaching, moving around in a lab, talking to students, etc., etc. I suspect Tom may have similar constraints. This isn't to say lightboxes are a bad idea. If you can do it, they're great. What pulled me through was kava, which I could buy over the counter without wasting more time on doctors. (Yes, I know about the liver damage hysteria. That's what it is. Hysteria. In extraordinarily few susceptible people, there's a problem which is preceded by plenty of warning signs. Tylenol is way more dangerous than that.) It's a very strange sort of depression, the one that comes from lack of light. You know perfectly well there's nothing actually wrong. And yet everything feels impossible. It's similar to jet lag, when you know perfectly well it's day time, but your brain is asleep.