Class

NSUnitIlluminance

A unit of measure for luminance.

Declaration

@interface NSUnitIlluminance : NSDimension

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

Accessing the Base Unit

+ baseUnit

Returns the base unit of illuminance. Equal to lux.

Accesing Predefined Units

lux

Returns the lux unit of illuminance.

Relationships

Inherits From

Conforms To

See Also

Energy, Heat, and Light

NSUnitEnergy

A unit of measure for energy.

NSUnitPower

A unit of measure for power.

NSUnitTemperature

A unit of measure for temperature.