1000W GrowLab 4'x4'

Hey All
Currently running a GL120 (4'x4') with a CAN33 in the tent to a COOLTUBE Lumatek 400w Hortilux HPS being pulled by a Hydrofarm 6" 430 cfm exhaust with just a passive intake from the lower flaps of the tent with a 4" clipon fan over canopy and oscillating 6" on floor 4 plants grown in FFOF 5 gal. buckets. Setup is in basement with ambient temps at 68-69*F and the tent with fan controller on low to medium is at 71-72*F.
MY question is if I added a 1000W Lumatek Dimmable with Hortilux HPS do you think my setup would handle the added heat. Never had a 1000w'tr but I am aware of the added heat. With my fan controller having the capabilaty to go higher do you think i can combat the problem.......Any input would be great!!!!!

dont bother with a 1000 watt in a tent. Heat will be rediculous to control. You can get away with the same results with a 600w.

I was looking at the dimmable option.....1000Watt during fall and winter and then start dimming it down thru spring and summer.....still think ill have a heat problem...winters here are pretty brutal(-25F Outside----55-60*F in Basement) any basement growers help would be great.

has anyone used a 1000w HPS in a tent(4'x4')???????????