luminous flux

https://doi.org/10.1351/goldbook.L03646
Of a source of @L03647@ \(I\) in an element of solid @A00346@ \(\text{d}\varOmega\) is given by \(\text{d}\varPhi = I\ \text{d}\varOmega\).
Sources:
Green Book, 2nd ed., p. 72 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 979 [Terms] [Paper]