I use a cool air hood reflector for my 400w grows. It keeps my temps usually at 25c always. This just takes air from my home and moves it through the hood back to my living room and the process repeats. Then I've got another exhaust fan in my room pulling air through their to directly outside. Keeps your light cool without bringing in extreme humidity. Also your going to want an air conditioner able to keep your whole place cool as the air will heat up from the hood circulation.