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<div>The '''lambert''' (symbol L, la or Lb) is a non-[[SI]] unit of [[luminance]] named for [[Johann Heinrich Lambert]] (1728–1777), a Swiss mathematician, physicist and astronomer. A related unit of luminance, the [[foot-lambert]], is used in the lighting, cinema and flight simulation industries. The SI unit is the [[candela per square metre]] (cd/m²).<br />
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== Definition ==<br />
1 lambert (L) = <math>\frac{1}{\pi}</math> [[candela]] per [[square centimetre]] (0.3183 cd/cm²) or <math>\frac{10^4}{\pi}</math> [[candela|cd]]&nbsp;m<sup>-2</sup><br />
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==See also==<br />
Other units of luminance:<br />
<!-- in order of relevance in regard to lambert --><br />
* [[Apostilb]]&nbsp;(asb)<br />
* [[Blondel (unit)|Blondel]]&nbsp;(blondel)<br />
* [[Bril (unit)|Bril]]&nbsp;(bril)<br />
* [[Nit (unit)|Nit]]&nbsp;(nit)<br />
* [[Stilb (unit)|Stilb]]&nbsp;(sb)<br />
* [[Skot (unit)|Skot]]&nbsp;(sk)<br />
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{{SI light units}}<br />
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==References==<br />
* [http://www.schorsch.com/kbase/glossary/luminance.html "Lighting Design Glossary: Luminance" at ''Schorsch Lighting Design Knowledgebase'']<br />
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[[Category:Units of luminance]]<br />
[[Category:Non-SI metric units]]<br />
[[Category:Photometry]]</div>201.248.56.154