Redshift (software)

Redshift
Redshift 1.11 on Ubuntu MATE 17.10 Alpha 2
Developer(s) Jon Lund Steffensen
Initial release 4 November 2009 (2009-11-04)[1]
Stable release
1.12 / 20 May 2018 (2018-05-20)[2]
Repository
Edit this at Wikidata
Written in C, Python
Operating system BSD, Linux, Windows
Available in English
License GPLv3
Website http://jonls.dk/redshift/

Redshift is an application that adjusts the computer display's color temperature based upon the time of day. The program is free software, and is intended to reduce eye strain as well as insomnia.[3]

Redshift transitions the computer display's color temperature evenly between daytime and night temperatures to allow the user's eyes to slowly adapt. At night, the color temperature is low and is typically 3000–4000 K, preferably matching the room's lighting temperature. Typical color temperature during the daytime is 5500–6500 K.

Features

Redshift is primarily distributed for and used on the Linux operating system. Initially it had been designed to be controlled from the command line, but meanwhile has added GUI interfaces to support most Linux desktop environments. Those frontends include redshift-gtk, redshift-plasmoid, and nightshift. redshift-gtk is included in Redshift's source tree. In addition it provides a tray status icon that can enable or disable Redshift, or adjust the color temperature automatically.

Redshift can be used to set a single color temperature and brightness ("one shot mode") or can adjust the temperature and brightness continuously to follow the sun's elevation, in which case it will transition to the night color temperature settings near twilight. The temperature and brightness settings for daytime and night can be user-configured.

To determine the Sun's elevation the software requires the user's location in form of latitude and longitude.[3]

On Linux and BSD operating systems, Redshift supports multiple monitors through the X extensions RandR (preferred) or VidMode, or through the Direct Rendering Manager. Because Redshift can only be configured to use the same gamma correction on all monitors it controls, it is usually desirable to run one instance of the program per monitor.

Reviews

Redshift has been positively reviewed by Linux users,[4][5][6] who note that Redshift has some installation and user interface advantages compared to the f.lux Linux port xflux. However, f.lux's systems have since been updated to enhance its dimmed display.[4]

Ubuntu MATE plans to provide Redshift as an application installed by default in their upcoming release 17.10.[7]

Linux Mint Cinnamon provides Redshift installed by default since their 18.3 release.[8]

See also

References

  1. ↑ "Redshift 0.1". 4 November 2009. Retrieved 26 October 2013.
  2. ↑ "Redshift releases".
  3. 1 2 Github release 1.9
  4. 1 2 Gordon, Whitson. "RedShift Makes Your Screen Easier on the Eyes at Night". LifeHacker. Retrieved 3 March 2015.
  5. ↑ Popov, Dmitri. "Improve Your Night Sleep with Redshift and F.lux". Linux Magazine. Retrieved 3 March 2015.
  6. ↑ Pot, Justin. "Redshift Keeps Your Eyes Sharp & Helps You Sleep [Linux]". MakeUseOf. Retrieved 3 March 2015.
  7. ↑ Wimpress, Martin (2017-07-28). "Ubuntu MATE 17.10 Alpha 2". Ubuntu MATE. Retrieved 2017-08-08.
  8. ↑ "New features in Linux Mint 18.3 Cinnamon". Linux Mint. Retrieved 2017-12-01.


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