@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:t7-11.1>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "7-11.1" ;
  skosxl:prefLabel "luminous efficacy of radiation <specified photometric condition>"@en ;
  skosxl:altLabel "K"@en ;
  skos:definition "quotient of luminous flux (<<t7-13>>) and the corresponding radiant flux (<<t7-4.1>>) 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 "Luminous efficacy of radiation for photopic vision is expressed by\n\n[stem%unnumbered]\n++++\nK = (Phi_\"v\")/(Phi_\"e\")\n++++\n\nwhere stem:[Phi_\"v\"] is luminous flux (<<t7-13>>) and stem:[Phi_\"e\"] is radiant flux (<<t7-4.1>>).\n\nFor scotopic and mesopic vision see <<cls-0.4>> and <<cls-0.5>>.\n\nSymbols for different photometric conditions:\n\nstem:[K], <for photopic vision>; stem:[K'], <for scotopic vision>; stem:[K_(\"mes\";m)], <for mesopic vision>; stem:[K_(10)], <for the CIE 10&deg; photopic photometric observer>; stem:[K_\"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:7-11.1> .