LUMINOUS EFFICACY Of RADIATION
Definition
A <LUMINOUS EFFICACY Of RADIATION> is a <Property> that, for a specified photometric condition, is the quotient of luminous flux and the corresponding radiant flux for a specified photometric condition; expressed as K=Φv/Φe, where Φv is luminous flux and Φe is radiant flux. (IEV ref 845-21-090)