Lumen
(Abbreviation lm) is a unit of luminous flux (a derived unit of the SI system). To give you an idea, the luminous flux of a 100 W light bulb is approximately 1500 lm, a candle has approximately 13 lm.
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(Abbreviation lm) is a unit of luminous flux (a derived unit of the SI system). To give you an idea, the luminous flux of a 100 W light bulb is approximately 1500 lm, a candle has approximately 13 lm.