I run 2 1k horitilux ,xl hoods,1 8in inline fan, LG 12k btu A/C ,1 6in inline fan, 6 in small intake fan, Co2 and regulator and thats for Flower! Veg is a 8 bulb Big boy T5's 2 asalating fans. I run the A/c in my room 24/7 and my grow room a/c 24/7 my veg room runs on 24/7 for the first 3 weeks...