IEVref:845-27-114ID:
Language:enStatus: Standard
Term: luminous flux maintenance factor, <of an electric light source>
Synonym1: lumen maintenance factor, <of an electric light source>
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Definition: ratio of the luminous flux of an electric light source at a given time in its operational life to its initial luminous flux, the electric light source being operated under specified conditions

Note 1 to entry: In IEC standards, “lumen maintenance” is also commonly used with the same meaning.

Note 2 to entry: The luminous flux maintenance factor has unit one and is usually expressed in per cent.

Note 3 to entry: This entry was numbered 845-07-65 in IEC 60050-845:1987.


Publication date:2020-12
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