phot

Also known as ph

A phot (ph) is a photometric unit of illuminance, or luminous flux through an area. It is not an SI unit but rather is associated with the older centimetre–gram–second system of units. The name was coined by André Blondel in 1921.

Key facts

Unit.name: Phot
Unit.standard: CGS units
Unit.quantity: Illuminance
Unit.symbol: ph
Unit.units1: SI derived unit
Unit.units2: SAE units
Unit.inunits2: 929 fc

via Wikipedia infobox

Wikidata facts

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conversion to SI unit: 10000
Wikidata SPARQL query equivalent: wd:Q901492 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)
unit symbol: ph

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Metric equivalence: 1\ \mathrm{phot} = 1\ \frac{\mathrm{lumen}}{\mathrm{centimetre}^2} = 10,000\ \frac{\mathrm{lumens}}{\mathrm{metre}^2} = 10,000\ \mathrm{lux} = 10\ \mathrm{kilolux}