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Cambridge Building Energy & Environment Portal

lux meter


A lux meter is a device for measuring brightness, specifically, the intensity with which the brightness appears to the human eye. A lux meter works by using a photo cell to capture light. The meter then converts this light to an electrical current, and measuring this current allows the device to calculate the lux value of the light it captured.


  • No: 3
  • Measurement: luminous flux in a room
  • Range: 0-200000 lux
  • Accuracy: ±2% of Rdg ±1 digit
  • Resolution: 0-2000 lux (1 lux); 2000-20000 (10 lux); 20000-200000 lux (100 lux)


Manual: lux meter