{"pid":"https://si-digital-framework.org/SI/units/candela","unitId":"candela","label":"candela","symbol":"cd","startValidity":"1967-10-13","endValidity":"1979-10-10","unitType":"SI base unit","unitTypeId":"https://si-digital-framework.org/SI#SIBaseUnit","unitDefinitionLabel":"candela1967","unitDefinitionId":"https://si-digital-framework.org/SI#candela1967","definition":"The candela is the luminous intensity, in the perpendicular direction, of a surface of $1/600\\,000$ square metre of a black body at the temperature of freezing platinum under a pressure of $101\\,325$ newtons per square metre.","definingResolution":"CGPM13-Res5","eventName":"13th meeting of the CGPM","eventDate":"1967-10-16","resolutionLink":"https://doi.org/10.59161/cgpm1967res5e","unitDefinitionStatus":"superseded","previousVersionDate":"1967-10-12","hasPreviousDefinition":true,"previousDefinition":"https://si-digital-framework.org/SI#candela1948","nextDefinition":"https://si-digital-framework.org/SI#candela1979","resNbr":"5","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":[],"notesIds":[],"nextVersionDate":"1979-10-11"}