en

lm

1 symbol

Terminological databases

Lennunduse terminibaas

ID 728934 Last modified 03.05.2024
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Domain Physicsunits of measurementair traffic
  • valgusvoo ühik rahvusv. mõõtühikute süsteemis (SI). 1 lm võrdub valgusvooga, mida punktikujuline valgusallikas kiirgab ruuminurka 1 steradiaan, kui tema valgustugevus on 1 kandela.
  • unit of luminous flux, equal to the luminous flux per steradian emitted by a point source of one candela of uniform intensity
luumen
lm symbol
lumen
Usage examples
  • Manufacturers of luminaires for fluorescent lamps without integrated ballast with total lamp lumen above 2 000 lumen shall provide at least the following information on free-access websites and in other forms they deem appropriate for each of their luminaire models.
lm symbol
lumen

Metroloogia terminibaas

ID 572160 Last modified 16.09.2026
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Domain metrologyunits of measurement
  • valgusvoo erinimetusega SI tuletatud ühiku nimetus/tähis
  • name/symbol of the SI derived unit with special name for luminous flux
luumen
Usage examples
  • Luumen, tähisega lm, on SI-süsteemi valgusvoo mõõtühik, mis väljendab valgusallika kiiratava nähtava valguse tajutavat võimsust.
lm symbol
Usage examples
  • 1 lm = 1 cd·sr.
lumen
Usage examples
  • The lumen, symbol lm, is the SI unit of luminous flux, which quantifies the perceived power of visible light emitted by a source.
lm symbol
Usage examples
  • 1 lm = 1 cd·sr.

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