Ideally there would be a model with the generator only next to the wheel and a wire running up to a handle-bar mounted lamp, which would also allow the lamp to be adjusted as one rides. I ride a Moulton and the generator is too far down to reach while riding due to the 20" wheels, also the suspension might well shake it to bits! The lights themselves probably weigh nothing compared to the generator, but I guess it would help reducing the weight of the generator a bit. My only real concern is that the light shuts down when I stop. It would be nice to have some LiPos that received a charge when running and power the lamp when still, but not sure if there would be enough output for something like that.