Difference between revisions of "Useful Life (of a lamp)"

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{{languages|Useful Life (of a lamp)}}
{{languages|Useful Life (of a lamp)}}
[[Category:2.3 Light Sources]
[[Category:2.3 Light Sources]]
[[Category:Alphabetical Index]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 1970-89 Edition]]

Latest revision as of 10:01, 1 March 2009

2-3-445

The length of time during which the luminous flux emitted by the lamp exceeds a specified proportion of its initial value.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)