I used to run into alot of heat issues in the summer, I grow in a shed in my yard. Years of substandard yields and plants dying from heat and stress I decided to use AC, I tried everything from enclosing the light and having fans take the heat away, dry ice, regular ice, hosing of the shed every morning .. nothing worked until I got a portable AC unit and a grow tent. The AC saved me. I paid around 100 bucks for my first one off craigs list it lasted a season ... got a new one last year and its still running strond for 350 from walmart, I jsut had to add an extended tube to vent the air away and i am set. 400 watt hps light crowing Chocolope, Ak47, Warlock and Chronic, they are doing great in this 100 degree feeling weather we are having.