Grow Room Airflow Question

Was up all just got a few ???? I have a 4x4x6 grow tent running a 400 watt HM&HPS setup had a jerry rigged airflow setup SO I just bought two 4 inch inline fan pushing 195 cfm is this enough airflow too keep a temp in control and one more ????? with the size & wattage of my tent how many plants is best to flower in my tent THX for all the help may all your buds be frosty. PS heres my set up please comment and subscribe
http://www.youtube.com/watch?feature=player_embedded&v=AwbDBCQ82WM

i think it should be enough cfm looks like a good setup

you could put 16 SOG plants in there or if you want to LST then you could probably put 6-8 in there with a good amount of veg time. Definitely sounds like you have the airflow covered. I would use one for exhausting just your lights and the other for filtering and recycling air in the tent and just have a passive intake. PEACE