Gold leaf, metal flake, LED lights: you've got nothing on the LumiLor electroluminescent coating system.  Designed by Darkside Scientific, Lumilor is a sprayable coating that can be permanently applied AND that can be illuminated with a simple electrical current.  Yes, you heard that right!  Add an electric current to whatever you coated and it lights up the night.  Darkside is a research and development company specializing in electroluminescent technologies who's mission is "to provide environmentally friendly electroluminescent coatings that marry art and science together to deliver innovative new products."  I say mission accomplished.  Outside the obvious applications of custom painted helmets, motorcycles, and cars, do you see any other applications?  What about highways marker and signs?  Tell me what you think.  Also, check out some of LumiLor's video demonstrating the possibilities.