There is a lot of controversy about what makes for safe bike riding, but one thing everyone agrees with: lights are important. Even during the day; that’s why cars have daytime running lights. But most people don’t use lights in the daytime because the batteries run down and have to be replaced or recharged more often.

Danish company Reelight solved this problem with induction powered lights; magnets are mounted on the spokes and every time the wheel turns, a current is generated in the light. Now they have introduced a new version, the teensy little Reelight CIO, that flashes every time the wheel turns. It has a little battery so that if you come to a red light (and people on bikes in Denmark stop at red lights, even at T intersections!) it keeps going for two minutes. It's being launched on Indiegogo and has already blown through its targets.

This is a really good idea. It is pretty much theft-proof with its wire mount, it is no maintenance, no worry. So many of the bike accessories we see have lasers and GPS systems and fancy technologies; this is simple and logical and doesn't even have an on/off switch.