Originally Posted by
noglider
Are you saying a wire from the dynamo to the light is safer than one from the battery to the light?
What do you think about my-and-@viich's point about double conversion of energy?
I think that breakage of the dynamo to light isn't a problem. Most decent bikes run them in the fork.
I think that breakage of a wire going into/out of a battery is a serious problem.
I think that double conversion of energy is negligible when compared to shorting/breaking a wire to/from a battery.