Tokudai- What kind of fan do you use? I am going to a hydro store on Friday and I'd like to know what you would suggest. I have a whole in my reflector to cool it, 4in....I ran the light for an hour yesterday, and the temps got to over 100...but I didn't have the light hung and my ionizer blowing up into it..so I don't know how accurate it is... I'm going to try to hang it soon and have more accurate starting point. I don't even have a great stand fan atm, but that will happen soon too. The room is a small bathroom and has passive intake (through door). It already has a whole in the ceiling that leads to the attic. Thanks for any advice you have...:jointsmile: Bree