Skot (unit)

Skot (symbol: sk) is an old and deprecated measurement unit of luminance, used for self-luminous objects (dark luminance).

Unit conversions

One skot is equal to:

• $\frac{1}{10^3\pi}$ candela per square metre
• 10⁻⁷ lamberts
• 10⁻³ apostilbs
• 10⁴ brils
• $\frac{1}{10^7\pi}$ stilbs (candela per square centimetre)
• about 0.0000929 foot-lamberts

See also

• Photometry (optics)

SI photometry quantities

Quantity		Unit		Dimension	Notes
Name	Symbolr	Name	Symbol	Symbol
Luminous energy	Qv	lumen second	lm⋅s	T⋅J	Units are sometimes called talbots.
Luminous flux / luminous power	Φv	lumen (= cd⋅sr)	lm	J	Luminous energy per unit time.
Luminous intensity	Iv	candela (= lm/sr)	cd	J	Luminous power per unit solid angle.
Luminance	Lv	candela per square metre	cd/m2	L−2⋅J	Luminous power per unit solid angle per unit projected source area. Units are sometimes called nits.
Illuminance	Ev	lux (= lm/m2)	lx	L−2⋅J	Luminous power incident on a surface.
Luminous exitance / luminous emittance	Mv	lux	lx	L−2⋅J	Luminous power emitted from a surface.
Luminous exposure	Hv	lux second	lx⋅s	L−2⋅T⋅J
Luminous energy density	ωv	lumen second per cubic metre	lm⋅s⋅m−3	L−3⋅T⋅J
Luminous efficacy	η	lumen per watt	lm/W	M−1⋅L−2⋅T3⋅J	Ratio of luminous flux to radiant flux or power consumption, depending on context.
Luminous efficiency / luminous coefficient	V			1
See also: SI · Photometry · Radiometry