{"pid":"https://si-digital-framework.org/SI/units/candela","unitId":"candela","label":"candela","symbol":"cd","startValidity":"1979-10-11","endValidity":"2019-05-19","unitType":"SI base unit","unitTypeId":"https://si-digital-framework.org/SI#SIBaseUnit","unitDefinitionLabel":"candela1979","unitDefinitionId":"https://si-digital-framework.org/SI#candela1979","definition":"The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency $540 \\times 10^{12}$ hertz and that has a radiant intensity in that direction of $1/{{683}}$ watt per steradian.","definingResolution":"CGPM16-Res3","eventName":"16th meeting of the CGPM","eventDate":"1979-10-12","resolutionLink":"https://doi.org/10.59161/cgpm1979res3e","unitDefinitionStatus":"superseded","previousVersionDate":"1979-10-10","hasPreviousDefinition":true,"previousDefinition":"https://si-digital-framework.org/SI#candela1967","nextDefinition":"https://si-digital-framework.org/SI#candela2018","resNbr":"3","resolutionBody":"CGPM","resolutionType":"Resolution","cstLabel":"luminous efficacy","cstHidden":"LuminousEfficacy","constant":"luminous efficacy","constantPid":"https://si-digital-framework.org/constants/LuminousEfficacy","prefixRestriction":false,"unitQuantities":[{"code":"LUIN","label":"luminous intensity"}],"notes":["No notes"],"notesIds":["https://si-digital-framework.org/SI#candela1979note1"],"nextVersionDate":"2019-05-20"}