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Area Lighting / Radiation, quantities and units

IEV ref845-01-56

Symbol
K

en
luminous efficacy of radiation
quotient of the luminous flux Φv by the corresponding radiant flux Φe

K= Φ v Φ e MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadUeacqGH9aqpdaWcaaqaaiabfA6agnaaBaaaleaacaqG2baabeaaaOqaaiabfA6agnaaBaaaleaacaqGLbaabeaaaaaaaa@3C6D@

unit: lm · W -1

Note – When applied to monochromatic radiations, the maximum value of K(λ) is denoted by the symbol Km.
Km = 683 lm • W -1 for vm = 540 x 1012 Hz (λm ≈ 555 nm) for photopic vision.
Km = 1700 lm • W -1 for λm = 507 nm for scotopic vision.
For other wavelengths : K(λ) = Km V(λ) and K′(λ) = Km V′(λ).


fr
efficacité lumineuse d'un rayonnement, f
quotient du flux lumineux Φv par le flux énergétique Φe correspondant

K= Φ v Φ e MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadUeacqGH9aqpdaWcaaqaaiabfA6agnaaBaaaleaacaqG2baabeaaaOqaaiabfA6agnaaBaaaleaacaqGLbaabeaaaaaaaa@3C6D@

unité: lm · W -1

Note – Lorsque l'on considère des radiations monochromatiques, la valeur maximale de K(λ) est dénotée par le symbole Km.
Km = 683 lm • W -1 pour vm = 540 x 1012 Hz (λm ≈ 555 nm) pour la vision photopique.
Km = 1700 lm • W -1 pour λm = 507 nm pour la vision scotopique.
Pour les autres longueurs d'onde: K(λ) = Km V(λ) et K′(λ) = Km V′(λ).


ar
مفعولية منيرية للإشعاع
فعالية ضيائية للإشعاع

de
photometrisches Strahlungsäquivalent, n

es
eficacia luminosa de una radiación

fi
säteilyn valotehokkuus

it
coefficiente di visibilità di una radiazione

ko
방사의 발광효율

ja
放射の視感効果度

no
nb lysekvivalent for stråling

nn lysekvivalent for stråling

pl
skuteczność świetlna promieniowania

pt
eficácia luminosa de uma radiação

sr
светлосна искористивост зрачења , ж јд

sv
ljusekvivalent för strålning

Publication date: 1987
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