I just replaced all the standard flourescent tubes in the garage with new ones (12 years out of bulbs seemed decent enough). I picked up some Phillips 40w 4' bulbs at Home Depot that were labeled "Natural Light" or "Sunlight" or something along those lines. GREAT lights, and at 6-odd dollars per two pack, it may be the budget winner.
I'm not in the metal halide tax bracket yet.
*edit* While you are at HD, pick up a 1000W contractor light for the fine polishing
