| 摘要 |
A light device includes a sensor secured to the fork of a bicycle and an inducing block secured to the wheel for moving pass the sensor so as to actuate the sensor. A housing is securing to the bicycle for receiving a microprocessor which is coupled to the sensor. A displayer is coupled to the microprocessor for displaying a speed of the bicycle. Two light bulbs of different wattages are coupled to the microprocessor so as to be energized when the inducing block moves pass the sensor. A switch is coupled to the microprocessor for controlling the lighting modes.
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