Yeah, I have a 4" Vortex inline cooling it and temps in my cab are about 4-6 deg above room temp. This could be a bit better if I had an additional passive intake hole. Problem with cooling this lamp is in order to inline cool it you need to remove the reflector which is right above the bulb - loosing that direction of light up into the duct. I have not figured out a way around this - and honestly it is a horrible design. I would not recommend that light to anybody.