en

lumen

1

Terminological databases

Valgustehnika terminibaas

ID 644094 Last modified 25.11.2025
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Domain electric lighting
  • SI süsteemi valgusvoo ühik
    Good to know
    • 1 luumen on võrdne monokromaatilise kiirguse valgusvooga, mille sagedus on 540 × 1012 Hz ja mille kiirgusvoog on 1/683 W.
    • Tähis: lm
  • 1 lm is equal to the luminous flux of a beam of monochromatic radiation whose frequency is 540 × 1012 Hz and whose radiant flux is 1/683 W.
    Good to know
    • Symbol: lm
luumen
Usage examples
  • 6-vatise leedlambi valgusvoog on ca 450 luumenit.
lumen

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