lux

The SI unit of illuminance, equal to one lumen per square metre.

lux is a cli tool for controlling the brightness of external monitors that use DDC.

Features

• Set monitor brightness
• Set monitor contrast
• Multiple monitor support

Installation

See releases for pre-built binaries.

Using Chocolatey:

choco install lux

Usage

Run lux --help to see options.

Lux uses set and get verbs. Values must be between 0 and 100.

Caveats

• Does not work over SSH. This is due to a limitation of the Win32 API being used.
• Capability checking has not been implemented since I encountered a bug when attempting to use it.

Acknowledgements

Wouldn't be possible without the work to translate the calls to the Win32 API by Alexander Horn in DisplayConfiguration.cs.