This circuit of the generator bicycle light uses a capacitor which continues supplies power to the light while the bicycle at the stop light/sign. This circuit contains a conventional light bulb. A LED light bulb and a resistor may work better than the standard light bulb in this circuit to allow the light to shine longer than the regular bulb. This can be a good safety ideal so the bike riders can be seen by traffic. For any other who may have a more technical idea of this circuit to make it more efficient, you are welcome to have your version of this circuit. This is just a simple circuit that I made up on this app.