The March 2009 issue of Trailer Boat Magazine featured an article titled "Bright Thinking" by Jim Hendricks, which described how to use battery-powered stick-on LED lights as dome lights for his boat. He happened to use Sylvania DOT-it Lights, which retail for around $8.00 each, but they're available from a number of companies. A little expoxy secured the lights to clamps which he used to mount them on his Bimini top.