I suspect those folks who may know the answer are just confused without grow area. We can probably presume you're using HID since heat is a problem, though it's still a guess.
Have you considered putting a PPFD app on your smart phone (if you have one)?
I know there are ventilated fixtures with separate intake and exhaust and which could be separately piped out of the grow area as a method of reducing area heat, in addition to the grow area ventilation.