THIS. When I asked if you had an air-cooled hood, I should have described it. You should definitely hook up your reflector hood to your exhaust (the 6" inline). You should open the second 4" hole (and think about putting a carbon filter there soon), but leave the glass on. The glass traps heat inside the hood, making it easier to exhaust. I'm happy to see your temps are getting better. I'd like to toast my next bowl to your seedlings being female.