are my fans sufficient

i have just put my new tent up 2day which is 1.2 x 1.2 x 2 meters am planning on running 2 600w lights above a large 9 pot wilma system, i have a 4 inch intake and a 5 inch exhaust and am planning on to clip on fans to move the air my question is if any 1 can help will my fans be good enough or should i purchase a 8 inch or 10 inch exhust and a 6 0 8 intake am just worried that would be 2big for the size of area please give your veiws am going to start a jornal sunday with pics so please watch and give me your thoughts thanx

i reckon you need more , just wait til summer.

thought of cool tubes? usefull fo small areas and 4" would be fine

2 x 600watt lights is going to give off a lot of heat, you never mentioned whether you was running 1 or 2 ballasts & where they are housed, lil more info be helpful, also the 4" & 5" intake & exhast but what size are the fans

yeah, what cfm are you talking here? you've got to take that into account.