deciding which light for 12 plants.

[httphonda]

I just bought 2 600s off ebay, a little over $200 each, and ought to be much more versatile than the 1000w I'm borrowing for now, in the end I need room for 18 plants, you may want to consider 2 400s for what you want to grow.

Ok I will check ebay for sure, I'm thinking I have the room and everything except the lights currently, my thoughts are to become a caregiver, and this will allow me to grow up to twelve plants per person (five people total) Would you recommend switching to hydroponics? also would 600 w lights work for about 24 to 36 plants?
Dirtnap what kind of lights did you purchase on ebay?