lux

https://doi.org/10.1351/goldbook.L03651
SI derived unit of illuminance, \(\text{lx} = \text{lm m}^{-2}=\text{cd sr m}^{-2}\).
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]