2x2x4 grow tent

hi all im planning on getting a 2x2x4 grow tent i have a 250 watt hps and a 4inch inline fan my question is what could i average for yeild in that small of a space and how much plants i could keep in that space as well

I am thinking you can really only fit one plant in that space. Anymore and it will be to crowded. You will get a better yield with just one.

I agree with MidnightJoker, unless you're considering 12/12 from germination for a small sea of green.
Yieldwise you can probably expect between an eighth and a quarter- you're working out of a constrained space.

4 ft high is going to really limit you. I have a DR60II and really like it.