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!