Class

UnitIlluminance

A unit of measure for luminance.

Declaration

class UnitIlluminance : Dimension

Overview

You typically use instances of NSUnitIlluminance to represent specific quantities of illuminance using the NSMeasurement class.

Illuminance

Illuminance is the luminous flux incident on a surface. The SI unit for illuminance is the lux (lx), which is derived as one lumen per square meter (1lm / 1m2).

The NSUnitIlluminance class defines its base unit as lux.

Name

Method

Symbol

Lux

lux

lx

Topics

Accesing Predefined Units

class var lux: UnitIlluminance

Returns the lux unit of illuminance.

Relationships

Inherits From

Conforms To

See Also

Energy, Heat, and Light

class UnitEnergy

A unit of measure for energy.

class UnitPower

A unit of measure for power.

class UnitTemperature

A unit of measure for temperature.