|This article may rely excessively on sources too closely associated with the subject, potentially preventing the article from being verifiable and neutral. (February 2015)|
|Developer(s)||Michael Herf, Lorna Herf|
|Initial release||February 2009|
|Stable release||Windows: v3.10
Mac OS X: build 30
|Operating system||Microsoft Windows, Linux, Mac OS X, iOS|
|License||Proprietary, with free download. (with patent claim)|
f.lux is a computer program developed by Michael and Lorna Herf. It adjusts a computer display's color temperature according to its location and time of day, based on a user specified set of longitude and latitude geographical coordinates, a ZIP code, or a city name.
The program was designed to reduce eye strain during nighttime use and to prevent disruption of normal sleep patterns.
f.lux automatically calibrates the computer or device display's color temperature to the time of the day. The user also has the option of choosing a color preset or disabling f.lux for an hour and returning the screen to its normal calibration. The software offers five preset color settings on OS X: candle, tungsten, halogen, fluorescent, and daylight. For Microsoft Windows, the halogen, fluorescent, and daylight settings are available—as well as Incandescent, Dim Incandescent, Candle as well as Ember and The iOS version uses the same presets as the Mac version.
A "Movie Mode" is available on Windows and OS X that reduces the adjustment for 2.5 hours, which is long enough for viewing most feature films.
- f.lux: F.A.Q
- Zukerman, Erez. "Review: f.lux makes your computer usable at night". PC World. Retrieved 3 March 2015.
- Tanous, Jim. "Save Your Eyes and Improve Your Sleep with f.lux for OS X and Windows". TekRevue. Retrieved 3 March 2015.
- Hoffman, Chris. "Reduce Eye Strain and Get Better Sleep by Using f.lux on Your Computer". HowToGeek. Retrieved 3 March 2015.
- Pash, Adam. "F.lux Changes Your Screen Brightness by Time of Day". LifeHacker. Retrieved 3 March 2015.