Luminous flux

Luminous flux is a measure of the energy emitted by a light source in all directions.

The SI unit of Luminous flux is the lumen (lm).

One lumen is defined as the amount of light that falls on a unit spherical area at unit distance from a light source of one candela.

SI light units

Template:SI light units

Template:Standard-stubcs:Světelný tok de:Lichtstrom ja:光束 pl:Strumień świetlny sl:svetlobni tok

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