I bought a complete MH setup, bulb, reflector, and ballast all in one (METAL HALIDE 250 watt MH Grow Light w 250w ballast hood - eBay (item 160226253218 end time Apr-20-08 12:03:00 PDT) this is the exact light i bought). I just remembered that its better to use a HPS for budding and i didnt know if i could switch out the metal halide bulb for an HPS. Can i do this or do i have to buy a whole other system? Cuz if i do....fuck...im out of cash.