I hear ya bro. That heat is a bitch! It sucks even in the winter! The 600 will do just as good. I grow 9 plants under a 1000 watter and get 3 oz per plant. Life would be easier with a 600 and i would grow the same amount of weed.I run a 1000w too. I've also been thinking about downgrading... But I just spent so much damn money this summer on cooling stuff it would be stupid at this point.
Weed will grow just fine at 90 deg f. My room always ran that hot. My problem to was the low humidity.exactly I dropped $300 on an air cooled reflector, plus another $300 or some in-lines and ducting. Then another $100 on an AC unit because after all that stuff it still wasn't cool enough.