| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device capable of reducing stress of a person.SOLUTION: A lighting device emits, by emission of at least one LED element, illumination light of an illumination color within an area S1 surrounded by an isotemperature line W1 passing a point A (0.350, 0.311), an isanomal V1 with respect to a blackbody radiation locus V0, an isotemperature line W2 passing a point B (0.397, 0.370), an isanomal V2 with respect to the blackbody radiation locus V0 passing a point C (0.388, 0.378), and a straight line connecting the point B and the point C, on an xy chromaticity diagram defined by the International Commission on Illumination. |
