Need opinions/advice for grow box.

This will be my first grow, and I just spent a couple days setting up my growbox. The specs of it are:

the base is 38" long x 21" wide. It is 50" high.
Painted flat white throughout.
I have 10 23W CFLs, of various colour, 2700K, 3500K and 6500K (3 of 2700 and 3500, 4 6500)
I also have a 100W HPS.
On both sides of the box are 2 computer fans, so 4 in total. Seems to keep it cool.

I'm wondering if this would be a suitable environment to grow 4 plants.
Thanks if you reply!

why is it that I see people make posts about horrendous looking plants and get pages of advice, yet I can't get one response here for a legit question..Please help me out here lol.

Seems definitely suitable; what CFM are the fans? What size pots are you going to use? Do you have/need a carbon filter? You said you have 4 PC fans as intake, what's your exhaust?

I was thinking about putting another computer fan at the top as exhaust. Or I could switch 2 computer fans around and have them blowing in the opposite direction for exhaust?
Given my area for pots, I dunno what size I should get. Or even if 4 plants is right. I only have 36" from the ground the top of my CFLs, so thats only 3 feet to grow. Should I get a bunch of little plants?

Yeah you might want to look into SOG, SCRog, or LST; use the search function if you cant find any threads (in the advanced cultivation section). For ventilation, it's easier to have a passive system; where most of your fans are exhaust and only 1 or 2 intake plus a few holes here and there. This allows the exhaust fans to suck in air and keep a negative pressure in your grow room.