Lumen
The lumen, abbreviation lm, is the SI derived unit of luminous flux. It is the amount of light that falls on a unit area at unit distance from a source of one candela. Lumen is also the name of Asteroid 141.
The lumen, abbreviation lm, is the SI derived unit of luminous flux. It is the amount of light that falls on a unit area at unit distance from a source of one candela.