Skip to main content

learn.howToCalculate

learn.whatIsHeading

Luminosity (light intensity) converters translate between candela, lumens, lux, and foot-candles for lighting calculations.

Formule

1 lumen = 1 cd × solid angle (steradians)

Guide étape par étape

  1. 11 candela (cd) = standard light intensity unit
  2. 21 lumen = 1 cd × solid angle (steradians)
  3. 31 lux = 1 lumen/m²; 1 foot-candle = 10.764 lux

Exemples résolus

Entrée
Desk lamp 500 lumens, distributed to 2 m² area
Résultat
Illumination ≈ 250 lux (good task lighting)
Typical office ~300-500 lux

Erreurs courantes à éviter

  • Confusing lux with lumens (very different meanings)
  • Neglecting distance and inverse square law

Questions fréquentes

Why separate lux from lumens?

Lumens = total light output (independent of area); lux = intensity at surface (lumens/area).

How does distance affect illumination?

Inverse square law: doubling distance reduces illumination 4×. Affects lamp placement.

Prêt à calculer ? Essayez la calculatrice gratuite Luminosity Converter

Essayez-le vous-même →

Paramètres