Bicycle illumination apparatus

A bicycle illumination apparatus having a plurality of light emitting diodes is provided and can obtain the only output corresponding to the rotating state of the generator. A lamp (14) is a device connected to a generator 19 for generating according to the running of the bicycle, and the lamp has a plurality of light sources (20a to 20d) and a switch controller (21). The light sources (20a to 20b) include light-emitting diode (31, 32) that emits light in accordance with an electrical output of a generator. The controller is configured to control an electrical connection between the power generator and the light sources in accordance with a rotating state of the generator.