Welcome to f.lux
https://justgetflux.com/news/pages/v4/welcome/?v=4.120
WEBWhat f.lux does. The light that comes from computer and mobile phone screens has a real effect on the human circadian system, especially at night. Based on your wake time and location, f.lux creates a custom lighting schedule for you that changes every day throughout the year. By moving the sliders, you can fine tune the colors to fit your needs.
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