Microgrow suggestions

I need to hide a kit from my roommate, so it needs to be relatively small the constrainments on the dimensions would be somewhere along the lines of :

H: 1.5FT
W: 2FT
L: 2.5FT

What materials for this would be most economic, and effiecient for the kit to be successful?

hey, I am newish here and I know another web site that actually forbids talking about hiding grows from people you live with. I don't have an opinion on that, so, I did see a microgrow in one of those tall tower pc's. It measured 2' H x 6" W and 2.5' L and had a 110W CFL inside. It used the regular pc fan for ventilation, so it looked totally stealthy.

I've seen the computer grow rooms, and the stealth factor on them is highly admirable and they're quite economic. i have an old case and I planned on using it, but how can I make it even more concealable because I'm using a 400W light, any suggestions comments would prove quite helpful