Units & MeasuresGlossary · one of 45 terms

Lux

Short definition

The intensity of light falling on a surface, measured in lumens per square meter (lm/m²). It is the core unit for illuminance levels.

In detail

The same fixture yields high lux in a small room and low lux in a large area, because lux depends on the area the light spreads over. Standards (EN 12464-1) define target lux per space type: 500 lux for offices, 100 lux for corridors.

Facts

Symbollx

CategoryUnits & Measures

Target by space

Office (General)500 lx

Office (Detailed Work)750 lx

Restaurant200 lx

Café200 lx

Home (Living)150 lx

Home (Kitchen)300 lx

Store (General)300 lx

Store (Display)750 lx

School (Classroom)500 lx

Hotel (Lobby)200 lx

Hotel (Room)150 lx

Corridor100 lx

Warehouse150 lx

TS EN 12464-1 target illuminance levels

Related terms

Lumen Illuminance Level

Guides that use this term

1 guides

Lighting Calculation: The Lumen Method Step by StepHow do you professionally calculate how many fixtures a space needs? We explain the Lumen Method step by step, with the real formula and a worked example.1 min

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