grow tent issue

whats up? i am having a problem with my grow tent setup and am fed up. i am using a 2x4x5 tent. i am using a ufo led lighting system. now what? i was thinking of doing a little bit more custom and hang 2 small oscillator fans in each corner to keep the constant flow of air and also a co2tank with 15min intervals. but i am stuck on how much air to be putting in due to the lack of extra heat from the led light system. and then finally to how high to have the light. i am new so please dont first-bash post me to death. thanks.
 
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