Phot
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Yerpo
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{{For|the 9th-century theologian and scholar|Patriarch Photius I of Constantinople}}
A '''phot''' ('''ph''') is a [[photometry (optics)|photometric]] unit of [[illuminance]], or [[luminous flux]] through an area. It is not an [[SI]] unit, but is equivalent to 10000 [[lux]].
Metric equivalence:
:<math>1\ \mathrm{phot} = 1\ \frac{\mathrm{lumen}}{\mathrm{centimeter}^2} = 10000\ \frac{\mathrm{lumens}}{\mathrm{meter}^2} = 10000\ \mathrm{lux} = 10\ \mathrm{kilolux}</math>
Metric dimensions:
:illuminance = [[luminous intensity]] × [[solid angle]] / length<sup>2</sup>
== See also ==
*[[Illuminance]]
*[[Lumen]]
*[[Lux]]
*[[Photometry (optics)]]
*[[Light]]
== References ==
* Knowledgedoor, LLC (2005). [http://www.knowledgedoor.com/1/Library_of_Units_and_Constants/Quantity_Index/illuminance.htm Library of Units and Constants: Illuminance Quantity]. Retrieved [[2006-07-21]].
* [http://www.convertthis.com/converters/illuminance.aspx Illuminance Converter]. Retrieved [[2006-07-21]].
[[Category:Photometry]]
[[Category:Units of illuminance]]
[[Category:Non-SI metric units]]
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