| 摘要 |
<p>PROBLEM TO BE SOLVED: To control the optical output of a lighting load by reducing an effect of direct light of outdoor daylight. SOLUTION: This system is provided with a lighting load 8 for subjecting a definite surface in a closed space to irradiation, a sensor part comprising a first luminosity sensor 1a for detecting luminosity of the definite surface, a control part for controlling the optical output of the lighting load 8 by feeding back a detected value of the luminosity sensor, the first luminosity sensor for detecting a light A coming from outside the closed space into the first luminosity sensor by having it reflected by the definite surface, a light B coming from outside the closed space directly into the first luminosity sensor, and a light C coming from the lighting load into the first luminosity sensor by being reflected by the definite surface, and a second luminosity sensor 4 for detecting the light A and the light C, and the light B is detected by comparing the detected value of the first luminosity sensor and the detected value of the second luminosity sensor 4.</p> |
