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lumenhour

 - 1 dictionary result

lu⋅men-hour

  [loo-muhn-ouuhr, -ou-er]
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–noun Optics.
a unit of luminous energy, equal to that emitted in 1 hour by a light source emitting a luminous flux of 1 lumen. Abbreviation: lm-hr
Origin:
1920–25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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