I'm ordering a sun system 2 400w enclosed air cool in a 2x2x5' tent. Before I commit to a purchase I need to know about enclosed lights. In a tent does the exhaust setup work like this: passive air sucked in bottom > hot Tent Air -> cooled light > activated co2 filter > air blown out of the tent. Or do enclosed lights have their own pull air from outside and push it right back outside? Meaning I have to also have another exhaust for the tent. How hot will a 400w get in a 2x2x5 space without cooling? I can also get a 250w but i figured since they were the same price I was going to get the 400w