I think one of these would fit.
http://store.yahoo.com/lamps-now/20cfpchoods.html

"RLIrwin" wrote in message
...
I have a small sal****er tank (10 gallons) with two clownfish, 4 astea
snails,
and 4 dwarf hermit crabs. I put 4 pounds of Fiji live rock into the
aquarium
about six weeks ago. The purple color of the coraline algae was a nice
addition to the aquarium, but it seems to be dying. The water chemistry
is
good (amonia,ph, calcium, etc. all where the should be). I have one 15w
50/50
bulb (can't seem to find anything stronger for a 10 gallon tank). Any
suggestions on how to encourage the coralline algae growth would be much
appreciated.

Thanks

Bob