Cycling in the Dark

Who uses a generator? With Lithium batteries and Luxeon emitter led equipped lights, who needs a generator? I cycle all winter, despite the snow, and use a two light unit on my bar with dual 3 watt led's and a lithium battery, and can ride over two hours use even in 10 degree F weather. (keep the battery tucked inside your clothing to keep it warm) I doubt that the minor weight addition penalizes me as much as the drag from a generator would.

Right. Who needs a generator? I'd like to know how much electricity could be produced by the folks who walk tread mills and ride bicycles in health clubs. If these machines could power the overhead lights (or at least power themselves), what would the cost savings be?

Use strobe lights like in a diso.