400wHPS 5x2x7 closet What else do I need?

Well im about to move and of course that means so will my room. ill be using a walk-in closet theres a built in dresser with a cabinet above it that will be used for a mother and clone cab. Ill folwer in the 5x2x7 closet i have a 400w hps. I need advive on how to set up this space ? ill have pics up tomorrow.

Ok sorry havent had the net in a few months hope i can get some helps still. Well i done a little work since then, changed my plans some, i still got a few things left to do. Im going out and getting a fan tomorrow i found an 8in. 210cfm inline fan for $30 i need to get the ventilation going gonna cut a vent in my hood and run duct out it. I got a seed order planned out but i think im just gonna do a test run with some bag seed just so i can get the numbers down Before i go putting $100 in good genetics in there. Scrapped the big closet didnt go over to well with the old lady. So im gonna put my 400w up top and i put together a 6 bulb cfl fixture for my mothers and 2 40w 6500k flouros for clones. well i kinda need some advice on what type of medium to use i have some potting mix, and perlite left over from my outdoor last year, and any advice on what type of training pruning... dont have much experience indoors beside startingthem before movin outside and i have absolutely 0 hydro under my belt more of the organic type. Anyway all help will be greatly appreciated thanks +rep too Oh yeah check out this timer its the ge smart remote plus i found it at this store for $20 and the plug was missing from the package got it for $10 and i had a universal plug so its all good anyone have any experience with it