| 摘要 |
According to one embodiment, a marker lamp is supplied with electric power from an alternating constant-current power supply device via a saturable device. The marker lamp includes a solid-state light-emitting circuit functioning as a light source and a lighting circuit configured to subject the solid-state light-emitting circuit to lighting control. The marker lamp further includes an abnormality monitoring device configured to monitor a state of the solid-state light-emitting circuit and open, if detecting an abnormal state, an output side of the saturable device corresponding to the marker lamp.
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