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Section 7-114 entries

7-11.1luminous efficacy of radiation <specified photometric condition>7-11.2spectral luminous efficacy <specified photometric condition>7-11.3maximum luminous efficacy <specified photometric condition>7-11.4luminous efficacy of a source

7-11.4

luminous efficacy of a source

URNurn:iso:std:iso:80000:-7:ed-2:en:item:7-11.4

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-7/t7-11.4
urn:iso:std:iso:80000:-7:ed-2:en:item:7-11.4

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-7:ed-2:en:item:7-11.4

IEC

urn:iec:std:iec:80000-7:2019:::item:7-11.4

Designations

ENluminous efficacy of a source

FRefficacité lumineuse d'une source

Symbol

η_{v}

(η)

Notation systems

Rendered

η_{v}

Rendered

(η)

AsciiMath

eta_"v"

AsciiMath

(eta)

LaTeX

\eta_{\text{v}}

LaTeX

( \eta )

Definition

quotient of the luminous flux emitted and the power consumed by the source, expressed by

η_{v} = \frac{Φ_{v}}{P}

where $Φ_{v}$ is luminous flux (luminous flux) and $P$ is the power (ISO 80000-4: Mechanics) consumed by the source

quotient du flux lumineux émis par la puissance consommée par la source, exprimé par

η_{v} = \frac{Φ_{v}}{P}

où $Φ_{v}$ est le flux lumineux (luminous flux) et $P$ est la puissance (ISO 80000-4: Mechanics) consommée par la source

Units

l \frac{m}{W}

lumen per watt

View related quantities →

c d \cdot s r \cdot k g^{- 1} \cdot m^{- 2} \cdot s^{3}

candela steradian second cubed per kilogram square metre

View related quantities →

Concept HierarchyPendrill (2024)

L⁻² M⁻¹ T³ JL⁻² M⁻¹ T³ J quantitiesLevel 0 · Kind

Broader concepts

◇ L⁻² M⁻¹ T³ J quantities

Characterizes

● source

Ontology
isq:Quantity smart:TermEntry

Class Hierarchy

smart:Entity smart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t7-11.4

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	7-11.4
skosxl:prefLabel	"luminous efficacy of a source"@en
skosxl:altLabel	"eta_"v""@en"(eta)"@en
skos:definition	quotient of the luminous flux emitted and the power consumed by the source, expressed by [stem%unnumbered] ++++ eta_"v"…
isq:hasUnit	lm/W (lumen per watt)cdsrkg^(-1)m^(-2)s^3 (candela steradian second cubed per kilogram square metre)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-7

Related Entities

isq:QuantityShape isq:part-7 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry