@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t7-11.3>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "7-11.3" ;
  skosxl:prefLabel "maximum luminous efficacy <specified photometric condition>"@en ;
  skosxl:altLabel "K_\"m\""@en ;
  skos:definition "maximum value of spectral luminous efficacy for a specified photometric condition"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-7> ;
  isq:hasUnit [
    skos:notation "lm/W" ;
    skosxl:prefLabel "lumen per watt"@en
  ] ;
  isq:hasUnit [
    skos:notation "cd*sr*kg^(-1)*m^(-2)*s^3" ;
    skosxl:prefLabel "candela steradian second cubed per kilogram square metre"@en
  ] ;
  skos:note "See also <<cls-0.4>> and <<cls-0.5>>.\n\nThe value of maximum luminous efficacy for photopic vision is calculated by\n\n[stem%unnumbered]\n++++\nK_\"m\" = (683)/(V(lambda_\"cd\")) \"unitsml(cd*sr*W^(-1))\" ~~ 683 \"unitsml(lm*W^(-1))\"\n++++\n\nwhere stem:[V(lambda)] is the spectral luminous efficiency for photopic vision and stem:[lambda_\"cd\"] is the wavelength in air corresponding to the frequency stem:[540*10^(12) \"unitsml(Hz)\"] specified in the definition of the SI unit candela.\n\nSymbols for different photometric conditions:\n\nstem:[K_\"m\"], <for photopic vision>; stem:[K'_\"m\"], <for scotopic vision>; stem:[K_\"m,mes;m\"], <for mesopic vision>; stem:[K_(\"m\",10)], <for the CIE 10&deg; photopic photometric observer>; stem:[K_\"m,M\"], <for the CIE 1988 modified 2&deg; spectral luminous efficiency function for photopic vision>.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-7:ed-2:en:item:7-11.3> .