I have a 4x8 tent with 2 1000 lights, they are on their own ducting with a 6 inch fan pulling fresh air across the lights and exhausting in the attic. I have a 12000 btu air conditioning piped into the tent and right now i have it set on my master controller to on all the time. WIth it on all the time the temp under the lights is still 89 degrees or so. How can i get it cooler in my tent?