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

Revision as of 00:07, 25 February 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)

English • español

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