Lumen second

Lumen second is the SI unit of amount of light. Your unit symbol is lms. Calculated based on the integral of the luminous flux, expressed in lumens over time, in seconds:

In practice, the lumen hour ( lmh ) is often used as a measure, which is the amount of one lumen for one hour.

Overview of basic light sizes

  • SI unit
  • Photometric unit
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