Well, I skipped the cheap Inside Sun 250w HPS, and instead got a couple of these:

http://www.1000bulbs.com/product.php?product=31681

210 watts of CFL, in two bulbs, for $50 (with shipping). Not quite the perfect spectrum for flowering, but should still be okay. Gonna throw 'em on that Durban Poison x Skunk #1 and whatever happens happens. I might also have too many Blue Mystic females. I planted 5, and it looks possible that all 5 are female, and my flower box is only going to fit 2 or 3 of them.

So, I read a post by a guy who rotated plants under lights. Like, 2 females, but keep 1 of them in darkness for 12 hours while the other is under the lights. Then swap their positions, move the one under the light to a dark closet, and move the one in the dark closet under the lights. It'll be sort of a pain to move them twice a day during flowering, but I need exercise anyway. Heh. Basically, instead of turning the lights off for 12 hours a day, I'll just move the plants, and flower TWO sets of plants with one set of lights. That way I won't have to kill off any females. Sort of like a poor man's improvised munchie-powered light-mover!