| 摘要 |
A luminaire comprising a solid-state light source and a photosensitive transducer each operatively coupled to a controller. The photosensitive transducer is oriented to be within an illumination path of the solid-state light source. When the solid-state light source is in an ON state in which at least some light is produced, the controller controls the solid-state light source to be in the OFF state in which no light is produced for a brief measurement period imperceptible to a human. During the measurement period the controller obtains an ambient light level measurement from the photosensitive transducer without interference from the solid-state light source, which is in the OFF state. The controller may record turn ON and turn OFF times of the solid-state light source for use in controlling the solid-state light source in various circumstances. |
