Last Updated：2025/12/01
Sentence
技術者は十分な照明を確保するための露光試験で5,000ルーメン秒を記録した。
Quizzes for review
The technician recorded 5000 lumen-seconds for the exposure test to ensure sufficient illumination.
See correct answer
The technician recorded 5000 lumen-seconds for the exposure test to ensure sufficient illumination.
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Related words
lumen-seconds
Noun
form-of
plural
Japanese Meaning
「lumen-second（ルーメン秒）」の複数形です。ルーメン秒は、照度（ルーメン）と時間（秒）を掛け合わせた、光エネルギーの単位を指します。
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