{"constantId":"LuminousEfficacy","label":"luminous efficacy","shortLabel":"LuminousEfficacy","symbol":"${K_{\\rm{cd}}}$","value":683.0,"valueStr":"683","unit":"https://si-digital-framework.org/SI/units/lumen.watt-1","strExpression":"lm . W^-1","pid":"https://si-digital-framework.org/constants/LuminousEfficacy","resolutionLink":"https://doi.org/10.59161/cgpm1979res3e","resNbr":"3","resolutionType":"Resolution","eventName":"16th meeting of the CGPM","eventDate":"1979-10-12","updateDate":"1979-10-11"}