| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device capable of improving work efficiency of a long-time work by reducing a sense of fatigue of a person.SOLUTION: A lighting device 100 emits, by emission of at least one LED element 6, illumination light of an illumination color within an area S1 surrounded by an isotemperature line W1 passing a point A (0.419, 0.343), an isanomal V1 with respect to a blackbody radiation locus V0, an isanomal V2 with respect to the blackbody radiation locus V0 passing a point B (0.418, 0.390), an isotemperature line W2 passing a point C (0.397, 0.370), and a straight line connecting the point B and the point C, on an xy chromaticity diagram defined by the International Commission on Illumination. |
