Translation guide
A unit of luminous flux, measuring the total amount of visible light emitted by a source. In Japanese, it is usually expressed with the katakana loanword ルーメン.
Express the SI unit of luminous flux (lm).
The standard Japanese term for the unit lumen. Used in technical, scientific, and everyday contexts (e.g., light bulb specifications).
この電球は800ルーメンの明るさです。
This light bulb has a brightness of 800 lumens.
The unit symbol 'lm' is sometimes used in technical documents or on product labels, often read as エルエム.
光束: 1000 lm
Luminous flux: 1000 lm