i already have a 400w hps .. puts off alot of heat (due to having the ballast integrated into the unit) . the closet is 4 feet wide .. 2 feet deep and 7 feet tall. im expanding the closet as much as i can the new closet will be 4 feet wide, 4 feet deep, 7 feet tall. im looking to add some light, without heat .. so CFL's are the way to go. at the moment, the 400w HPS is being used from seed to harvest. when buying the CFLS, should i go all 2700? all 6500? or a mixture of both ?