What should i do?

Ive only had 2 successful indoor grows, and going on my 3rd. I have very limited space(2 * 3 * 3), and only grow for personal use. and was considering keeping my next grow limited to 12 or more small pot, single cola plants. Anyone have advice or comments?

P.s. Im growing with 175Watt MH, 100 Watt HPS, and 2 26 watt cfl's.

try some auto's:http://www.cannabis-seeds-bank.co.uk/automatic-flowering-dwarfs-128-c.asp