New grower needing Gbox advice.

So I'm in my first grow. I purchased a bookshelf from Walmart and a 3 socket light fixture which I installed upside down on the top board. I have 3 24w 6500k cfls. I put a piece of wood on the top front to help not stare into the light when going in the box. I plan on cutting a couple pieces of plywood to make doors out of for the front of the box.
The size of the box is LxWxH 29.63" x 11.63" x 31.63"
So my questions are....
Is this enough lights for 1-3 plants?
Is this enough space for 1-3 plants?
How big of a pot do i need to x-plant into for this size of box?
Can i use a type of caulk to make the box light tight and to seal it a bit for when it starts to flower?
I plan on making a DIY Walmart carbon filter.
I plan on installing doors in the front.
I plan on LST my plants
I plan to use 2500k cfl for flowering.
I have this box sitting in a walk in closet.
Im using Maricale Grow potting soil in double solo cups just to start. top cup has drainage holes in it.

My thoughts are that this is like a giant PC case. gonna put intake and exhaust fans somewhere. havnt decided where yet.
what do you guys think?
so far I have 1 plant going, I have 5 more OG KUSH seeds germing. I just wanted to see if I could get the 1 plant going, and since its going good I'm gonna plant the other 5 and hope to get at least 3 females.
Here is a picture of the box thus far. Im sorry if this is a lot all at once. Also I cant seem to get this post to drop down lines to make it more organized.

It looks like enough light to me. If you can afford more then do it. It depends on the heat that they give off and your ventilation. Plants can be molded into whatever space they are put in. I would start flowering these when they get 6". You can LST them to get a little more growth from them and more bud. Are you going to use both shelves or take the middle shelf out? The bigger the pot the bigger the roots and the better the end result. I think 1 gallon is all you're going to fit in there. If you seal the container then the plant wont get enough CO2 unless you can supplement it. Make the carbon filter first. It will smell a lot.

hey, thanks for the reply. right now I have an oscillating fan inside my closet so its only 75 deg at the plant. Do you think I could get away without co2? The shelf comes out. its there just to have her closer to light for now. I am deff going to LST for sure. I was actually going to try to get the plant to grow sideways in a circle around the pot to get as many tops to grow up as possible. My plan is to flower around 4 weeks. and this plant is not stretching at all. There is new growth that's right on top of the other node. How bad do you think it will smell when I start to flower?

Your big issue may be heat. You made no mention of intake and exhaust fans.

While your box is fine for veg, if you plan on getting any kind of yield, you may want to consider a tent or a bigger box. I have a veg cabinet that's about the same dimensions as what you have there, and two plant do ok, three is packed once the plants start taking off.

Oh.....as far as smell....depending on the strain....it's gonna stink to high-heavens. Right now I'm two floors above my grow room and I can smell the Lemon OG Kush from here.

I may just end up building a whole new box. Im going to need to contain the smell they will produce.