I’m old school HPS maybe someone else could chip in
I got mind-boggling stink 12-in from 720 watts worth of LED.
I think the most important thing is to not give a s*** that the smell comes out of my tent. I am fully legal, my landlord is okay, my neighbors are cool.
So to start off with I open up two sides of the tent, opposite directions, the skinny doors on the side. Just enough space to fit fans to clip on the top to allow airflow at either light level or slightly above light level depending on how high the lights are that day.
On the left side I have a fan pushing in on the right side I have two fans pulling out. This is in addition to my charcoal carbon scrubber exhaust system that is totally meaningless in this environment. That's just for dark time.
On the bottom of the tent I have a high volume hepa filter fan that has duct taped to it and then shoved into my tent and shows up at dirt level. I have actually removed the hepa filter, I only want high-speed air shoving into that tent as fast as goddamn possible. So that means there's a constant whirlwind underneath the canopy.
I have no AC. I have to grow at night. Today's temperature hit 99. The tent probably went around to 85 during it's dark period.
I have one large oscillating fan that points down towards them in a 4x4 tent and they take 3x4 of the space. It's on it all times.
My lights on daytime temps can be anywhere between 75 and 85, with an occasional rare peak to 90. If I attempted to close the tent and not have that ventilation system set up it would be crossing 100 in an hour.
Those terpenes still haven't gotten burnt off. On the other hand I have serious sulfur going in there with the Epsom salts at a tablespoon per gallon, 2 gal per plant weekly. So I'm sure that lemon dog and Ruby skunk are having a blast with it everyday.