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May 27, 2012
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Dictionary


lu•men-hour



Pronunciation: (lOO'mun-ouur", -ou"ur), [key]
—n. Optics.
a unit of luminous energy, equal to that emitted in 1 hour by a light source emitting a luminous flux of 1 lumen. Abbr.: lm-hr

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

lumenLumholtz's kangaroo
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