f.lux
 | |
 Two photos of a screen stitched together, f.lux disabled (on the left), and f.lux's default settings (on the right) | |
| Original author(s) | Michael Herf, Lorna Herf |
|---|---|
| Developer(s) | F.lux Software LLC |
| Initial release | February 2009 |
| Stable release | |
Android, iOS | |
| Available in | English |
| License | Freeware |
| Website | justgetflux |
f.lux (pronounced "flux") is a
Functionality
On installation, the user can choose a location based on
f.lux offers a variety of color profiles and pre-defined temperature values, modifying program behaviour for specific programs or activities; including a mode for film watching, decreasing red tinge (for 2.5 hours), and a darkroom mode that does not affect night-adapted vision.
Platforms
The program is available for
Efficacy
Reducing exposure to bright (1000 lux) blue lights at night time was linked to increased melatonin secretion in a 1996 study[11] but a 2018 study showed that changing the spectral composition of self-luminous displays without changing their brightness settings may be insufficient for preventing impacts on melatonin suppression.[12]
f.lux proponents hypothesize that altering the color temperature of a display to reduce the prominence of white–blue light at night will improve the effectiveness of sleep. Although the developer provides a list of relevant research on their website, the program itself has not been scientifically tested to determine its efficacy, and the equivalent Apple program, Night Shift, was shown to have no effect on sleep outcomes (sleep latency, duration, efficiency and wake after sleep onset) in a 2021 study on 167 college undergraduates.[13] f.lux has been widely and positively reviewed by technology journalists, bloggers, and users.[2][3][6]
See also
- Electronic media and sleep
- Oswald Labs § Agastya
- Purkinje effect § Use of red lights
- Red Moon (software)
- Redshift (software)
- Light-on-dark color scheme
References
- ^ "f.lux for iOS". f.lux. Retrieved October 13, 2018.
- ^ a b c d Zukerman, Erez (October 31, 2013). "Review: f.lux makes your computer usable at night". PC World. Retrieved 3 March 2015.
- ^ a b c d Tanous, Jim (October 15, 2014). "Save Your Eyes and Improve Your Sleep with f.lux for OS X and Windows". TekRevue. Archived from the original on October 17, 2014. Retrieved January 15, 2016.
- ^ "f.lux: F.A.Q. - I work nights. How do I flip the day and night settings?". justgetflux.com. Retrieved 31 October 2016.
- ^ "f.lux has been updated to a new version". justgetflux.com. Retrieved 31 October 2016.
- ^ a b Hoffman, Chris (October 23, 2014). "Reduce Eye Strain and Get Better Sleep by Using f.lux on Your Computer". How-To Geek. Retrieved January 15, 2016.
- ^ Hern, Alex (January 12, 2016). "Apple promises a good night's sleep with new iPhone feature". The Guardian. Retrieved January 20, 2016.
- ^ Tepper, Fitz (November 12, 2015). "F.uxd: Apple Says Screen Brightness App Violates Developer Agreement". TechCrunch. Retrieved January 15, 2016.
- ^ Perez, Sarah (January 15, 2016). "F.lux Asks Apple To Let Its Screen Color Adjustment App Back Into App Store". TechCrunch. Retrieved January 20, 2016.
- ^ "f.lux Home Page". f.lux. Retrieved September 21, 2016.
- PMID 8979406.
- PMID 31191118. Archived from the originalon 2022-01-15. Retrieved 2021-09-16.
- S2CID 233299395.