Hi Rui, Thinking of running a vertical t5 PAR grow.. In a box around 90cm(h)x30-60cm(d)x30-60cm(w). Also wondering if I can can build a rotating centre to put all the T5's on to slowly rotate the lights around distributing the PAR. Will be running 22" 24watt variation of T5 lighting w/ hopefully the following setup. (kinda copying the prof but changing it up a bit ) Link (probably running 4-10 bulbs depending on how much money I want to spend w/ expensive shipping) So just a few questions; I'm going to be running 100-200 watts of T5 in that little box will 200CFM be able to extract out the heat quick enough? Can I run multiple 24watters off a 54watt T5 ballast(i.e. split the cables or whatever and how hot do the ballasts get)? What's the penetration power of T5's? (You can get them real close, right?) I might eventually use UV-B as well, I hear the minimum distance was 12" without getting mutations within the plant/buds? I'll draw up my idea in sketchup, I wonder if I'm describing this correctly >.< Cheers!