density of exiting luminous flux with respect to area at a point on a real or imaginary surface
Note 1 to entry: Luminous exitance can be derived from the spectral radiant exitance distribution by
Integral limits can be confined depending on the spectral responsivity of the detectors used as a sensor.
Note 2 to entry: The corresponding radiometric quantity is "radiant exitance". The corresponding quantity for photons is "photon exitance".
Note 3 to entry: The luminous exitance is expressed in lumen per square metre (lm·m−2).
Note 4 to entry: This entry was numbered 845-01-48 in IEC 60050-845:1987.
Note 5 to entry: This entry was numbered 17-735 in CIE S 017:2011.