Over here in Auckland, New Zealand, there is a sudden drive for cycling safety. There have been several well publicised cases of cyclists being killed after cases of poor road design, bad driving, bad cycling etc. I can't help but think that lit up cyclists would help this. A quick search shows others are trying stuff, although not in the tight-fitting-top style that most cyclists here wear. http://m.instructables.com/id/turn-signal-biking-jacket/ This is a bit excessive - I think hand signals are enough, and bright lights are to show where the cyclist is. http://www.esthete-cycle.com/en/product/veste-esthete-velo-u... This is a bit of a full on jacket, but appears fairly robust.