Lets start with. 12 55w cfl and 145w led. in summer can get dam hot with 50cfm exaust a 2x2x6 cab i think as hot as a 150hps n no harder too cool. suffice to says the 2x2 is gone Moved. To a new metal cab 38x18x75 Scrubber n 300cfm elicent on outside with Speed controller looking at getting a 150hps 99$ cad tax inc . Maybe add a second for better spred For narrow space Or. Order a. 400w digital dimable balst 50%. 75%. 100%. cool tube add add pass threw duct for cooling and i can run it hotter in the winter Not sure id ever go 100% thinking too much heat