Puddlejumper

Puddlejumper is a luminescent raincoat that glows in the rain. Handsilkscreened electroluminescent lamps on the front of the jacket are wired to interior electronics and conductive water sensors on the back and left sleeve. When water hits one of the sensors, the corresponding lamp lights up, creating a flickering pattern of illumination that mirrors the rhythm of rainfall.

http://www.mintymonkey.com/lumiloop_p1.html
http://www.mintymonkey.com/lumiloop_p2.html
http://www.mintymonkey.com/aero_p1.html
http://www.mintymonkey.com/samsung_p1.html