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What is the difference between illuminance and lux?

illuminance | lux |

As nouns the difference between illuminance and lux

is that illuminance is (physics) the luminous flux incident on unit area of a surface; measured in lux or lumens while lux is in the international system of units, the derived unit of illuminance or illumination; one lumen per square metre symbol: lx.

As a verb lux is

(obsolete|transitive) to put out of joint; to luxate.

illuminance

English

Noun

(wikipedia illuminance) (en noun)
  • (physics) The luminous flux incident on unit area of a surface; measured in lux or lumens

    • lux

    English

    (wikipedia lux)

    Etymology 1

    From (etyl) (English light).

    Noun

    (lux)
  • In the International System of Units, the derived unit of illuminance or illumination; one lumen per square metre. Symbol: lx

    • Etymology 2

    Compare (etyl) luxer. See luxate.

    Verb

    (es)
  • (obsolete) To put out of joint; to luxate.
    • (Webster 1913) ----