The Squid
Spaced-out CephaloMOD
Welcome welcome. Glad to see you getting started. As already stated an HPS with a cooltube setup would be ideal. Or an LED light, but those are more expensive than the HPS initially, but IMO, the long run pays off, way less heat for you and your plants which is less exhaust and power all around. With that being said, I understand that you can't or don't want to just go out and buy an LED since you're all setup.
So my advice is to pull your exhaust duct that's at the top of your down down and right beside the lights. So it can immediately pull warm air up and out. But I bet since you opened that bigger flap in the back it makes a difference. 86 is just barely too hot anyways. 79-83 or so is just fine.
Otherwise, slick setup. Let us know if you need anything. Always feel free to ask.
Knowing is half the battle. 
So my advice is to pull your exhaust duct that's at the top of your down down and right beside the lights. So it can immediately pull warm air up and out. But I bet since you opened that bigger flap in the back it makes a difference. 86 is just barely too hot anyways. 79-83 or so is just fine.

Otherwise, slick setup. Let us know if you need anything. Always feel free to ask.

