bought a 2ft- 8 bulb t5 lighting system. going to build a box around it. its approx 2'x2' square. so here are my questions.. gonna have passive intake but wondering how i should do the air outtake. i dont want it smelling up the place so do they have tiny carbon filters for microgrows? or should i use a p.c far for the out and put some sort of filter outside of the box? also.. whats a decent height for the box? i plan on doing some training of some sort or cuttings but i dont want the box to be too short or too tall. if i start flowering the plants at 12 inches high then how much more will they grow during flower? and if anyone has designs for a good box.. please send them to me.. want to do alot of research before i build..