英语词汇“lumen-hour”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	lumen-hour
释义	WordReference Random House Unabridged Dictionary of American English © 2024 lu•men-hour (lo̅o̅′mən ou^ər′, -ou′ər),USA pronunciation n. [Optics.] Opticsa 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 1920–25
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