Just a word of advice: most stoned people don't want to read a question that long, unless it really has a good attention grabber at the beggining. Your real questions are in itallics below. Just a little too much info. I skimmed it, and thought fuck this. Then I had a change of heart.

do I need that many bulbs?
You don't need any bulbs except one, but more light equals more weed. I would use as many as you can. More light also means more heat, and needs to be compinsated for with more ventalation. The choice is yours.

how long does a carbon scrubber half to be, to work efficently
Of course the bigger the better, but you will also need more CFM for bigger carbon scubbers. I would get the biggest one that you can get into your cabinet. But I would also not put my grow in my entertainment area, and try to grow some really nasty smelling shit, and think I'll 100% get away with it. You are fooling yourself or extremely stoned if you think this can happen, no matter how steathy you think you are. And if your cousin Randy happens to find out, then all of your family will know. Trust me it will happen. If you are going through with it anyway, I would devote most of your cabinet area to odor control, that is if stealth is important to you. Why don't you do like I did, and put your grow in a back closit and put a lock on the door, or some place where there is less traffic? Really, you don't need that crap you've been storing in there for years. Throw it out to make room, or build a shed.

I could put it on the end by the storage compartment and pipe throuth there using a couple of elbows, but will that lower the efficiency of the fan then?
More elbows and fittings and longer runs means reduced cfm. Just compensate with a little bigger fan.

And what about uneven heat removal?
In a cabinet that small I don't think you have to worry about it. Temp in any given space tends to want to equalize. Just suck air and it will work.

Perhaps I could get advice on how high to place the screen then.
Most people recommend 8 inches above the medium. That's what mine is and it works great. Of course you may not be able to do this in a cabinet that small, and that should be fine. You will just have a harder time reaching the back, and the plants will need to go into flower sooner (because there is less room to grow first), thus reducing the yield a little.

Hope that helps a little.
Opie Yutts Reviewed by Opie Yutts on . Cabinet Concerns Talked it over with the other half, since we have the addition of a little one to our happy family it's no longer worth having a large grow. While I wasn't supplying the whole town, I did sell to friends and a few family members. Now we just want enough for ourselves and enough left over to make hash with. Concept here is this. To build a stealth grow and conceal inside a media center cabinet. This will entail building two 4' tall 2' wide, 2' deep as "speaker stands for my baby advent Rating: 5