Thanks to Johannes Tolk for this (from Wired):
Gallery: Graffiti Artists Light the Way for Animation
By Jenna Wortham
Cologne-based art collective Lichtfaktor has transformed a simple street science into a lucrative new genre of illuminative art. Check out samples of their signature style of light scribing, which has landed them ad campaigns producing videos and images for companies like Current TV, Philips, Sprint, Speedo and others.