go to ebay and look out for a cheap going hps set, and keep a close look at your local building supply stores, one of the other guys made there a real bargain on 3 150W hps flutters yesterday, maybe you go happy too
with those 4 floros you won't do anything great for sure.
ngtybear was the guy who got happy
look at his post "cfl guys gets hps" or something like that