The present invention is an apparatus and method for illuminating a bicycle crank. A magnetic coil is coiled around a portion of a tubular structure which houses a magnetic component. The magnetic component moves slidably inside the tubular structure passing through the magnetic coil. The tubular structure is housed in an outer housing which encases a bicycle crank or fits within a specially designed bicycle crank. When the bicycle crank rotates, the magnet slides back and forth through the magnetic coil generating an electric current that is used to power an LED.