| 摘要 |
Disclosed is a warning sign capable of both emitting and reflecting light. The warning sign mainly includes a front member having luminance intensifying means and reflective panels, a middle circuit board having light-emitting diodes, and a back member having battery compartment, ON/OFF switch and power-supply plug. The reflective panels can reflect a light from an external light source and the luminance intensifying means can intensify light emitted by the light-emitting diodes to provide both passive and positive warning signals. The power-supply plug can be plugged into a cigarette igniter on a car as an alternative power source for the light-emitting diodes.
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