Won't take. Here's why.

Me being a night person starts with the fact that it's easier for me to stay up late working on a problem than to get up earlier and work on a problem. I think if I were retired, and had no one to answer to, I'd chase myself around the clock over a period of six months or so. Staying up later each night, and getting up later the following day. That, and I usually need to be awake for a while before I feel creative enough to bother sitting at the keyboard.

Your original point still holds, though. When the only light is natural light, adjust your schedule accordingly. Though I suspect this is easier done in the northern hemisphere during the summer. A power failure in the winter, especially at northern latitudes, would mean getting a LOT of sleep. <img src="/images/graemlins/smile.gif" alt="" />

Fortunately, this is not currently a choice I have to make. Generator + inverter + tv + dvd player == Happy Groo. <img src="/images/graemlins/grin.gif" alt="" />