I cant figure out your airflow inside the tent....the cold air comes out the AC, right next to an exhaust filter on the ground where it is sucking out the rest of your cool air.
Then you have huge bubbles of hot humid air around the lights, and how do even get any circulation? Blowing hot air around the upper canopy isn't going to do anything. The air is stratified.
Try to get the filter/exhaust up higher and get a fan to blow that cool ac air into your canopy, then put a couple rotating tower fans in the corners.