imo i would run that in a 3x2 or even better a 2x2 then stuff the cab.. how tall is the space..
check it with 390w your going to need 100cfm pc fan to keep the cab 10 above ambient. just buy 1 fan 100 cfm or like 130cfm if u are going to use a filter. you know anything about passive intake?
IMO= in my opinion
so u have a 3x3x8 which is 72 cubic ft and 9 sq feet. you want to have about 50-60 watts per sq ft. with 390w at 9 sq ft you have 43w sq ft. if u wanna use the 3x3 space and not convert it to a 3x2 space you would have another 100 watts. if u use 390 watts in a 3x2 u would have 65w per sq ft.
now seeing you are using cfls and tubes your temps might not get too high if the doors open but i could tell you 300w is 300w whether its from cfl or hid it will put out about the same amount of heat. you could be good with a big fan chilling in your closet.
now about odor control. with the fan in the febreeze bucket, it wont filter all the smell if the door is open, or cracked slightly open. it will only work if your closet has negative pressure. now to acquire this negative pressure your closet would have to be closed and sealed; no intake fan is needed just an exhaust. you want to suck all the air out of the cab thru the exhaust fan thru the febreeze bucket. if u had an intake fan you would be pushing air in, so it would escape thru and non sealed part of ur closet. same thing with the standard house fan....door cracked and a filter will be useless if the fan is blowing air around and out the closet.
if u like to read i can send u some links...teach u alot of shit to improve your closet cab
thats def a great setup but once in flower u may need a few more depending on how bushy the 2 get ur gonna top....and if u wasnt gonna clone i would suggest fimmin over toppin much better results....hell id fim anyways since ur gonna veg that long and jus get some clones from the bottom or 1 or 2 after ya fim..good luck im glad i could help and ill keep givin any advice that i can...i really appreciate all the advice. i tried to post pics but it looks like i cant do it from my iphone and i dont have access to a computer. but i have the cfls on the sides, two 24" flourescents above and two 24" flourescents mounted on the wall in the back. right now theyre surrounding a stand i have that the germinating mediums(4"x4" planting cups) are on. ill remove the stand when i transplant straight into 4 or 5 gal. pots/buckets. i planned on getting those y adapters but didnt know where to get them, thank you so much for that great tip lilrob1887. i was thinking of getting a total of 8 more bulbs to have 12 all together, so i would get 4 65k and 4 more 27k, and y adapters. Veg with the 4 55k, 4 27k, and 4 65k for 6 weeks and then flower with 8 27k and 4 55k for 9 weeks? sound good? im planning on topping 2 out of my 4 plants, cloning the two cuttings so ill have a total of 6 plants if thats successful. and then i am lst'ing them all. again, my strains are a.m.s and blue mistic.