thanks for all the insight. ive been doing a decent amount of research into this. maybe thats why im all over the place. im just gonna make a bigger box. i dont know how im gonna get it home but ill figure that out. when i filter the air going in whats a good filter to use? i originally was going to just use a vent register filter. it looks like the prefilter to the carbon can i got from htg supply. anybody have any suggestions bout where to mount the ballast? common sense tells me not near the plants as the light would heat it more and incase of spillage, and up higher is where the hotter air is... but the little guys got some weight to it for being the size it is.