I've been in the process of adding a sump/fuge to my setup. I have not decided on the light on my fuge that will house chaeto. I was shopping in Wal-Mart today when I looked in the pet area and found this light bulb. It's a 10 watt cf
bulb made by Lights of America that is 6500K and fits into an incandescent hood.
I just happen to have an old hood that will fit my future 15H fuge. The bulbs cost $4.84 each before tax. So for around $10 I get 20 watts of light in an actual aquarium style hood. This may not be a new idea but I think it will be an inexpensive clean looking setup. It will be a few more weeks before I get the fuge up and running so I will see how this works. Hope this helps someone out.