My friend has a small room with 6 lights..No AC just exchanges air. I told him at the beginning of this summer to go spend 500 bucks on a cheap AC cause the outside temps are going to be in the 80's and 90's and his plants aren't going to produce anything. Of course he didn't want to spend the money and time to put in some cooling.
Instead he ran his room throughout the summer hitting temps in the high 90's, low 100's and his plants looked like they've been in bud for ten days with the exception of one.. There was one plant directly under his intake duct that has air blowing on it through the entire cycle that was developing. He really couldn't figure out why that was the only one
As summer finished and the outside temps dropped his room got back in the low 80's and his plants started developing over the next month until he couldn't maintain healthy fans and leaves and had to chop. His bud barely made good blasting material.. He figures he spent more on power than what he can get out of the crop. I think he had those things in bud for almost 4 months. Lol. Anyway. If I'm not growing in a dialed room and my temps hit over 82-84 range.. I back off the nutes, increase airflow (if possible) and weather the storm until the temps are in proper range. I've seen people up their feed in hot conditions not realizing it's an eviromental issue and fry their plants.
Put your timers back on 12/12 ;)