Illuminance

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Illuminance The density of luminous flux on a surface, is measured in footcandles (one lumen per square foot) or lux (one lumen per square meter).

Illuminance was formerly often called brightness, but this leads to confusion with other uses of the word. "Brightness" should never be used for quantitative description, but only for nonquantitative references to physiological sensations and perceptions of light.

  • 1 metre-candle = 1 lux
  • 1 phot = 1 lm/cm2 = 104 lux
  • 1 foot-candle = 1 lumen/ft2 = 10.76 lux
  • 1 milliphot = 10 lux

[edit] Also See

[edit] Reference

  • Wikipedia see Illuminance [1]

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