@robbie
MH chuck out some serious heat mate, ive just swapped over from my 250w mh too 250w cfl because of the heat issue. With the mh the temps were 32 with the cfl there down too 24 the cfl really cant compete with the mh in terms of growth but i only start seedlings under it for a week or so then they go under the hps. Running your lights at night helps with temps, if you can bring in fresh air into the tent via an open window this helps as does venting into another room but if its a hot day your right, not much you can do about it. Ive used ac in the past to combat heat but i was using alot more wattage then now ive dropped down a few watts and use air cooled hoods heat isnt really a problem.......yet lol well see what happens when it gets really hot.