Thanks for the info, I'm building another box and this would definitely help. Also I assure you the hanging design is completely safe, wiring and connections done by a professional haha. But I enjoy this design because the Angles of the arms allows you to flood the lower buds with light.Just for future reference, these are $4 -http://www.lightingdirect.com/index.cfm?f359=true&page=search:browse&bathroom-lighting-fixtures=c1742&categoryid=1742&s=price_low
Hold 4 bulbs or 8 with Y splitters. You can of course get then in 6 bulb, 8 bulb, all the way to twenty bulbs for really cheap. Not to bash your DIY, these just seem safer and cheaper.
For $15 (including bulbs) you can easily run 184w of CFL
Your plants look great though! Keep it up!