If I were to start growing indoors sometime, what kind of light would be good for a smaller-scale grow in an apartment if I get one anytime in the somewhat near future? I'm not sure if there will be periodic maintenance visiting to take care of the place like there was a few times at the last apartment I was at, so I might have to conceal the grow in a small area like a closet in one of the rooms, in which case I'm thinking I'd hopefully be able to fit two plants. For this small of a grow, what would be the most efficient, cost-effective, and preferrably inexpensive choice of light? I'm guessing some kind of smaller hps?

I'll probably like to get a little more into this topic pretty soon.

Thanks a lot,
Joe