If it were my plants, I would say think 86F is a bit on the warm side. I like to keep it 75-80F. If you have a thermostat in the room in where your tent is, drop the temp a few degrees and that should do the trick. Or see if you can the door open and blow a steady stream of fresh air into the room.
I hooked up a fan that blows on the light, you can see it if you check out the thread in my signature. That brought the temperature down and I am right around 78F right now. My only option for letting fresh air in is to open the hatch to the attic which is in the grow room. Do you think I should try this?