hey H...what's up! Jamstigator nice stuff...you guys both make good argument for the cause...It comes down to personal choice once again...I like the argument of the penetration of the 1000w, and I agree...with a cooltube and strong fan system...I agree no heat problem, but I also love what i have read about 600 watt giving out more light proportionately per watt than the other wattage lamp.
And if heat is an issue, then you better err on the cool side for sure...good to see ya around H' later.peace