how big should it be

This is my first grow and i cant seem to figure out how big my grow box should be. im growing 3-4 plants with cfl lights im gonna lst them so how big should i make the grow box

Hmm. for 3-4 plants an area that is about 2.5ft x 2.5ft x 3.5ft should be good. Size of the room is least of your worries really.

That seems kind of small to me... I would only be able to fit 2 in there and they'd still be touching the roof. I probably veg too long though.