1. phot

noun. a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux.


  • lx
  • lux

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Sentences with phot

1. Adjective
Other units of illuminance that scientists and engineers use include ​phot or foot-candle​, with 1 Phot equal to 10000 lux and 1 foot-candle as 10.7639 lux.