Well, if you want to go really cheap you can get some decent enough wide (maybe full, not sure) spectrum CFL's from your local big box home improvement store, or online. I'm referring to the EcoSmart CFL full spectrum bulb. Probably not the best, but decent enough. You can also pick up a fairly cheap 1 or 2 light kit from your local camera store which will have a real correct fluorescent bulb, and output more light bulb for bulb than the CFL's I mentioned. Probably cost $200-400 for a basic kit. You can, of course, go much, much higher. You'll may still need to keep the ISO up somewhat in order to get a smaller aperture so you don't run into problems keeping your subject in focus as much.