Like equinom mentioned, it really depends on the plants you want to keep. You can just get low light plants, put some C02 in and your plants will grow fine. Maybe a little slow but grow nevertheless.
However, if you dont want to limit yourself in plants and you are confined in space, go for the pc lighting (or if you want to diy, overdrive fluorescents). Great lighting in the least amount of space without having to go to MH's.