I installed LED's under the running boards on an Arctic Cat (Lime green of course). The LED's are from a company called Plasma Glow and come in many different colors. To protect the LED strip, I mounted the strip in an aluminum 90 degree "L" channel. This was for two reasons: 1- the aluminum channel protects the LED's from damage of hitting anything and 2- the light from the LED strip is indirect. You can't see the lights only the glow!!!! This creates a awesome effect, it illuminates the snow under and around the sled makes it appear to be hovering, it is really COOL!!! have got many positive comments about it. Been running these LED's for 5 years (north woods of Wisconsin and the U.P. while ridding past many DNR and law enforcement folks with no complaints. They are subtle, but super effective. Wired them to the lighting side of the output coil of the Magneto. Remember, LED's draw very little current.
Tapped into the hot wire going to the instruments. Put in a switch and fuse in line to protect the rest of the lighting system in the event of a short in the LED circuit. the LED power supply is very small and runs on 12volts DC. BTY, would someone reading this please forward me the Wisconsin state statute that restricts the use of LED's on snowmobiles while moving. Have never been stopped for using this set up while moving? Would have to be a slow crime day to get a ticket for this!!!