Quote Originally Posted by Zompton
I am going to be making a grow room using a bookshelf frame (2.5'L, 1.5'W, 5.5'H) wrapped in panda film, that should be good enough for 3-5 white widow plants right?

I also need to know if this carbon filter with a 240 CFM fan be adequet for an exhaust system?

8 X 14 ACTIVATED CARBON ODOR SCRUBBER WITH 240 CFM

...or can i go smaller with this filter using a 130 cfm fan?

6 X 14 ACTIVATED CARBON ODOR SCRUBBER WITH 130 CFM FAN
First things first. People may disagree with me here, but I'll just say it./ Don't get a 400w setup. You've got 3.75 square feet of space. A 250w HPS, which will put out 25000+ lumens, is more than enough to grow in that. A 400 in an enclosed space like that is going to require a lot more hassle for cooling, stress, and ventilation than you should want to deal with. Really, you could do a CFL grow with around 250w too. Get two clamp lights, four Y socket adaptors, and some 32-36w CFLs. That would give you about 16000-20000 lumens.

Next issue. You'll get 3 plants, max, in that area. 2 plants would be better. If you've got three plants side by side, you've got 10" x 18" per plant. You could do it, but you'll need to veg for less than five weeks...something like 25-30 days. A WW plant that gets flowered longer will be too wide for a 10" x 18" area. If it were me, I'd go with two decent size plants...you'd have 15" x 18" for each. That's a couple of plants vegged until they were 12-14 inches tall, and then taken through flower. Other issue with your grow area...you may have heat issues even with a 250w. Still...a 250w hung from hooks would have the bulb about 8-10" from the top of the cab. You'll want at least 6 inches from the tops of your plants with a 250w, and the plant will be 8-10" from the bottom of a 3 gal. bucket. That gives you enough room to grow a 35-40" plant.

Finally...you've got around 20 cubic feet of area in the cabinet. Another reason to go with the 250w or CFL lights...a 130 CFM fan should be plenty for venting, if not cooling.

I agree with midnightAK. Start with a few plants, and only try to take 1-2 all the way through. Small grows are easier, you can still pull a decent harvest, and you'll get valuable experience. Small area = smaller amount of required light = less stress and heating/venting issues. Keep it simple.