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• Incandescent light bulb
  ...[[luminous efficacy]] of a typical incandescent bulb is 16 [[Lumen (unit)|lumen]]s per watt, compared with 60&nbsp;lm/W for a [[Compact fluorescent lamp|co ...acy" pg. 647</ref> Visible light is measured in [[lumen (unit)|lumens]], a unit which is defined in part by the differing sensitivity of the human eye to d
  104 KB (15,285 words) - 16:44, 16 December 2018