Space and lighting

i have a 3'wide x 4' 6"long x 3' 6"high space. i want to try 6 plants in this space. i have a 400 watt mh and hps. will this do for 6 or can i add a couple light socket type cfl 30 watt to help?

the lights will be fine for 6 i suppose but add some more cfl any way more the better

you can add more cfls but the 400 will be fine. I would try not to block the hid light with them though