That's what I had to do run them at night add a ac and have my exhaust fan run 24/7 now I stay around 75 but every now and then it creeps to 80 but I'm doing good for 2 600w hps in a attic I can only run my a.c. during lights out aswell since I'm on a 20a breaker so I set it to run from 12-5 n...