Lambert (unit) explained

The lambert (symbol L^[1] ^[2]) is a non-SI metric 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).

Definition

1 lambert (L) =

	1
	\pi

candela per square centimetre (0.3183 cd/cm²) or

	10⁴
	\pi

cd m⁻²

See also

Other units of luminance:

Apostilb (asb)
Blondel (blondel)
Bril (bril)
Nit (nit)
Stilb (sb)
Skot (sk)

References

"Lighting Design Glossary: Luminance" at Schorsch Lighting Design Knowledgebase

Notes and References

Web site: lambert . 2024-11-05 . . en-US.
Web site: Luminance Photometric Brightness Nit Stilb Apostilb Blondel Lambert Footlambert Skot . 2024-11-05 . www.schorsch.com.