advice please

I have an extra bdrm in the back of my house and want to grow as much as poss. for the amount of lighting I have. Ive been growing with 8 42w cfls and 1 4ft. shop light, 40w, and now I have a 400w hps with a 400w metal halide conversion bulb, Ive never used a 400 before and dont know how much it will grow,,, I would like to use all the lighting if I can, I am just goin nutz tryin to think of a good design, Im also thinkin, the closet can be used for seedlings and clones but not sure how to design, please help... rm is 10 1/2 x 12 1/2. I know I cant use it all but????

you could set up a light roller. and have a 600 watt instead?

Thats a good sized room, what kind of a budget and what results are you trying to get? You may want to view Al B Fucts post 'How to Get a Harvest every two weeks'. His setup doesn't use all of that room either. VV