| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lighting system which can make the end time of a mode substantially constant on the first day when power supply is turned on and after the next day when power supply is turned on and can improve user's convenience. SOLUTION: This lighting system is provided with a light source 50, an illuminance detection part 20 detecting illuminance in the surroundings, an illumination control means 40 which controls light output of the light source 50 in a first mode when an illuminance value in the surroundings exceeds a predetermined value and controls light output of the light source 50 in a second mode when an illuminance value in the surroundings drops below the predetermined value, a timer part 61 counting continuation time T2 of the second mode, a forced end means 63 ending the second mode of the first time after power supply is turned on forcedly, and a timer compensation means 62 compensating continuation time T2 of the second mode after the second time after power supply is turned on.</p> |
