online stores for MH&HPS?

Im looking into purchasing a 250w MH or HPS.
If i purchase one setup will i be able to screw bolth bulbs into it?
and if anyone can help me, i am looking for a solid site i can order MH and HPS from. or atleast the setup by itself. i can get the bulbs at homedepot

go to htg, they have the best prices.

htg is nice, pretty discrete and good prices. However they do also carry some lower end things that I wouldnt mess with though. Just remember when it comes to gear you typically get what you pay for in this industry