| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lighting system capable of making a sufficient illuminance correction without resetting the light beam attenuation data of an illumination load due to the stain of a luminaire even when the stain of the luminaire is removed, i.e., when the luminaire is cleaned. SOLUTION: This lighting system is constituted of a lamp 5, a memory section 1 storing the correction data in response to the light beam attenuation due to external causes such as the stain of a luminaire or the stain of an illuminance sensor 3, the illuminance sensor 3 detecting the reflected light on the upper face of a desk and outputting a voltage proportional to the reflected light quantity, a control part 2 changing the dimming signal in response to the correction data stored in the memory section 1 and the detected value of the illuminance sensor 3 and a dimming stabilizer 4 receiving the dimming signal from the control part 2 and controlling the light output of the lamp 5. The light output of the lamp 5 is feedback-controlled so that the detected output of the illuminance sensor 3 becomes a prescribed set value.</p> |
