I know i should be in lighting but this is the first time ive ever asked this. so its a beginners question. if i bought 120/240V 400W Lumatek Sun System E Ballast 400 Watt - eBay (item 250707567962 end time Oct-13-10 16:47:05 PDT) what else would i need with it? does dimming mean like to lower wattage lights? I assume i need a hood, and a cord set? and bulb anything else? also any suggestions on hoods that are cheapish? nothing over 150 id say. Also is 400watts to much for a tent thats 64"tall 20"deep 36 wide? sorry for the questions but im gonna have to spend some moulah on a light here soon.