You need to increase your air exchange. Have your extraction fan at the top of the tent, over the light if possible. Vent heat out a window or the room. You need cold air coming in from the bottom. Fans wont lower the temperatures, only move hot air, if you dont have cooler air coming in. Your inlet to your tent should be 2x your out. With a 6" exhaust fan you should have 2 inlets of 6". Possibly add air ducting too. Good luck!!π