pull heat from bulb ext 4-6" ducting . add 2ed fan lower to plants longs u keep em moist n happy 80 isnt that bad opt temp is 72.8 I think ? replace your liner with mylar and max light usage flat white reflects 98% of your light and not radint heat should help some too. other than spending some coin and picking up an inline fan plus ducting with a ssealed light fixture???? hope [any of this helpsUOTE][/QUOTE]