I used this bulb on my fuge with HUGE success. I would easily clip a quart to gallon size bag of chaeto every other week.
http://www.homedepot.com/p/EcoSmart...ulb-E-ECS-30-CW-FL-120/202668655#.UTEaw6UTvKI
Excellent, just what I was looking for. Thanks for the suggestion. Did you even worry about a reflector. Probably not even necessary other than keeping the light out of your eyes.