Originally Posted by Encyclia
If you are looking at a low-budget option (I mean other than putting them in a window!), you might just do simple curly-Q compact fluorescents. They aren't terribly bright or efficient, but they are dirt cheap and come in 6500K ("daylight").
I wonder if the cheap screw-in LED bulbs would be a good option, and possibly better than CFLs in terms of efficiency. The non-dimmable ones are only a couple bucks a piece.