| 摘要 |
It is presented a lighting device (2) arranged to embed light quality data in light emanating from the lighting device. The light quality data pertains to a status of the lighting device (2), e.g. with respect to its end of operational life. The light may be detected by a monitoring device (3) external to the lighting device (2). The monitoring device (3) can then help to determine the status of the lighting device (2), whereby maintenance operations of the lighting device (2) may be carried out. Maintenance personnel may thus replace lighting devices and/or light sources in need of maintenance as indicated by the status of each lighting device, before any lighting device in the system has reached an end of operational life.
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