equivalent veiling luminance, <for disability glare or veiling reflections>
luminance that, when added by superposition to the luminance of both the adapting background and the object, makes the luminance threshold or the luminance difference threshold the same under the two following conditions: (1) glare present, but no additional luminance; (2) additional luminance present, but no glare
Note 1 to entry: The equivalent veiling luminance is expressed in candela per square metre (cd·m−2).
Note 2 to entry: This entry was numbered 845-02-58 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-398 in CIE S 017:2011.