ILLUMINANCE SENSOR, AND LIGHTING FIXTURE

摘要

PROBLEM TO BE SOLVED: To perform a suitable illumination control without being affected heavily due to a status of a lighting fixture.SOLUTION: The lighting fixture is provided with a sensor element 15 which has a sensor surface opposing to an irradiation surface irradiated by a light source of the lighting fixture and detects illuminance of the irradiated surface; a sensor housing chamber 13 which has an opening part 16 at a position opposing to the sensor surface of the sensor element 15 and has an inner wall housing and holding the sensor element 15 and moreover absorbing light; and an opening circumferential surface 18 which composes the opening part 16 of the housing chamber and makes an acute angle with an inner side opening surface 18a of the opening part 18.