How big is your room ?

How hot does it get w/ all 4000w running continiously ?

How are you cooling it all ? A/C ? Swampcooler ? Air cooled hoods / How many blowers are cooling the lights ?

Got any pics. ?

I'm interested now .
I run a 10' x 12' room w/ 3000w. hps / 435,000 lu. - using about 8' x 9' of the area .

No a/c - and my room peaks at 88-89 degrees . No Co2 . I run a 250 cfm exhaust blower 15 min. of every hour and alot of passive intake w/ nive results .

You need fresh air in there somehow if you want to grow before you get the Co2 going . If the only time they get fresh air is when you open the door they're gonna be in rough shape .

Crispi :stoned: