| 摘要 |
The lighting apparatus 10 includes a plurality of luminaires 12 around an area 1, such as a car park or other public space. Some of the luminaires 12 have sensors to detect the presence of a body 18 in the area. Communication arrangements 20, 22 are provided between the luminaires 12 and are used to propagate an alert signal to all of the luminaires 12, when a body is detected by any of the sensors, that is, by the sensor of any of the luminaires 12. The luminaires 12 are allocated to device groups and the communication arrangements serve to propagate an alert signal to all of the luminaires in the same group as the luminaire whose sensor has detected the presence. |
