| 摘要 |
PROBLEM TO BE SOLVED: To enable an operation for lighting up a plurality of luminaires collectively and an operation for extinguishing them collectively to be performed using one button without requiring much effort.SOLUTION: A determination unit 51 of a controller 11 determines that an illumination group 1 is in a lighted state from when all of luminaires 13 in the illumination group 1 are lighted till when all of the luminaires 13 in the illumination group 1 are extinguished, and that the illumination group 1 is in an extinguished state from when all of the luminaires 13 in the illumination group 1 are extinguished till when all of the luminaires 13 in the illumination group 1 are lighted. A control unit 52 of the controller 11 controls, while the determination unit 51 determines the illumination group 1 is in the extinguished state, all of the luminaires 13 in the illumination group 1 to be in the lighted state when a wall switch button is pressed for a time shorter than a prescribed time, and controls all of the luminaires 13 in the illumination group 1 to be in the extinguished state when the wall switch button is pressed for a time equal to or longer than the prescribed time. |
