Underwater green light with Led's

[tkflash1]

Hi, i am thinking of trying to build an underwater green light with rebel led's for fishing. I see that they have available the 40, 50, 70, and 80 lumen at 350ma led's in green. I was thinking of using 24 of them in strings of three??? It will be run off of the trolling battery in my boat. What is the best way to drive them in this configuration? Most of the driver boards are for just 1 led. Am i better off building my own circuit? Where can i get schematic? Anyone do this already? I see they have some comercial ones with halogen, florescent or 5mm led's. None with the higher power led's. I am planning on putting them on a 1/2 inch aluminum square channel down middle of plastic tube with aluminum end cap to cool it in the water. They will be all hand soldered and epoxied to the 1/2 inch channel. Any suggestions will be greatly appreciated. Thanks