I'm runnin this same setup. I have 6 inch hoods and one 6 inch fan per set of lights. Then a 8 inch fan to clear the tent.Haven't lit all them up yet but should be fine. Hoping to not have to run my ac. Sent from my SCH-I535 using Grasscity Forum mobile app
I've done 40 before under 3 1000s and 1 600watts and got great results. You can check out a little bit under my link. But a 10x10x7 tent will be more than enough for four 1000 watt lights