I just got the exact tent. I dont know if 4" fans will be enough as the tent is so small, it will easily heat up. Definitely with a 400w HPS.

Im running 8 CFLs and my tempts are still getting to around 95 degrees. I plan to go out and grab an AC unit to put into the room sometime this week.

I need to friend you tho bc I want to know how you setup your tent. Im still trying to figure out how I am going to do mine.