| 摘要 |
PROBLEM TO BE SOLVED: To provide an illumination control facility which can detect illuminance by external light while specifying the direction by a simple configuration, and thereby can control the illuminance of a lighting fixture appropriately.SOLUTION: The illumination control facility for controlling the illuminance of a lighting fixture installed in a building includes a composite illuminance sensor installed in an arbitrary place of the building, composed of a plurality of illuminance detection elements for receiving the light from a plurality of directions and measuring the illuminance in the plurality of directions, and an illumination controller for controlling the illuminance of the lighting fixture by measuring illuminance (L) by the light from the plurality of directions, based on a signal from the composite illuminance sensor. |
