| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device which has a peak in wavelength of light that a sensor detecting luminosity is sensitive and enables a lighting space to have predetermined luminosity even when a light source having the light wavelength similar to the wavelength that the sensitivity of the sensor reaches the peak is used. <P>SOLUTION: A lighting device according to one embodiment includes: a first light source emitting light having half band width of 100nm or higher; a second light source emitting light having half band width less than 100nm; a first lighting circuit lighting the first light source; a second lighting circuit lighting the second light source; an optical sensor; and a control circuit performing the lighting control of the first lighting circuit on the basis of a detection value of the optical sensor and performing the lighting control of the second lighting circuit on the basis of a preset value when the optical sensor is operated. <P>COPYRIGHT: (C)2013,JPO&INPIT |
