lumen-hour

[ loo-muhn-ouuhr, -ou-er ]

nounOptics.
  1. 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 of lumen-hour

1
First recorded in 1920–25

Words Nearby lumen-hour

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023