This is a new generation bicycle light system with a unique tumbling magnet generator.
No battery is needed, no friction on any parts of the bicycle. The lights flash regardless speed of the bicycle and weather conditions. Very bright.
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It's a pretty good system, I've been using it for about a year now...Looks like a christmas tree going down the road but then again I have extra magnets and an extra coil set on mine....
I've also tried building a regular gen out of them... works pretty good for the little amount of torque it take to turn it.
here is a link to my gen setups: http://www.leebell.net/workshop/bobble.htm (http://www.leebell.net/workshop/bobble.htm)