| 摘要 |
An adapter is hooked to a ceiling socket located on the ceiling. Any one of first ring material and second ring material fixed to a chassis is interlocked to the adapter, to install the lighting apparatus on the ceiling. A circuit board is connected to a sensor board on which an illuminance sensor is mounted. The illuminance sensor outputs electric signals corresponding to the detected illuminance. A control unit adjusts the brightness of light emitted from a LED module, on the basis of the illuminance detected by the illuminance sensor. The illuminance sensor is fixed to the chassis in such a manner that it is inclined from a rotation axis about which the chassis is rotated.
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