I have just fitted a pair of Prism Frosted LED 501 Upgrade bulbs in Blue to the sidelights of my bike.
One thing for sure is you definately get noticed by car drivers.
I got mine from Halfords for £6.99

http://www.speeding.co.uk/acatalog/Prism_Lighting_.html

Thought I post this here as not to tread on Fry907's toes with his thread. But he got me wondering that with all the lighting mods there are for cars that there must be something we could use.

Dave