Bicycle Light With Dynamo. Make offer spanninga swingo xdo front dynamo light bicycle headlight w o cable black 20lux. 200 lumens waterproof easy to install never need battery 4 5 out of 5 stars 18 29 99 29.
The bicycle dynamo works as a current source it always tries to deliver its typical 500ma of current. Early dynamos were tire driven resembling small bottles mounted to a bicycle s fork and turned by the tire or rim as it moved past. Advantages of dynamo lighting.
If you make a dynamo light purchase through the amazon links a small cut goes to supporting cyclingabout.
A dynamo is an energy generating hub built into the front wheel of a bicycle that typically powers lights. Something a little different is the light and motion rando 500 which is technically a battery powered light but while in operation it will accept a trickle charge from your dynamo hub. To produce light when the bike is stationary some dynamo lights have a stand light facility usually a single blue white front light or red rear light led powered by a capacitor which runs for around five minutes. This is an ideal source for light emitting diodes which are current driven.