nternational Electrotechnical Commission
life of a lamp
the total time for which a lamp has been operated before it becomes useless, or is considered to be so according to specified criteria
Note 1 to entry: Lamp life is usually expressed in hours.
[SOURCE: IEC 60050-845:1987, 845-07-61]
IEC 62257-9-5, ed. 2.0 (2013-04)
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