| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress useless power consumption by lighting equipment which has a mode which makes lighting load turn off according to a sensor, and another mode for continuously lighting the lighting load with a switch by preventing mode switching due to an incorrect operation of the switch or an instant power failure. SOLUTION: The lighting equipment is equipped with a human detection sensor which detects existence of a human body, and an illumination sensor for detecting ambient illuminance. The equipment has a sensor mode in which it makes lighting load turn on only when ambient illuminance is low and a human body is detected, and a continuous lighting mode in which the continuous lighting of the lighting load is forcibly carried out irrespective of the above sensor, if the switch is operated. Moreover, priority is given to the sensor mode, when the illumination sensor detects more than the predetermined illuminance.</p> |
