There are some 15" flourescents out there. They are 14wt so you would
likely need two or three of them. You may need to go down to 12", which
are only 9wt, so you will need at least 4 of these. There is also this
32wt compact flourescent kit that might work for $60:
http://www.marinedepot.com/md_viewIt...roduct=CU01611