Do you stay too late to work on your computer or use your computer in the dark? It is probably hurting your eyesight, the blue light has more effects but you can handle this issue easily. F.lux a software designed for those you use computer in the night/dark room, it reduces blue light and give a warm color and make it comfortable for your eyes. It is free, easy to use, and cross-platform available for Linux, Windows, and Mac. It has panel indicator which is quite handy and there are bunch of options which can be configured from preferences.
F.lux uses location so it can automatically turn on night mode for you but it only uses latitude and longitude/zipcode of your city, so you don't need to worry about your location privacy issue and it doesn't even track, if you are thinking in that way.

flux

flux

F.lux is available via 3rd-party PPA, the official PPA has no packages for latest Ubuntu versions but for 14.04/12.04.

Available for Ubuntu 16.04 Xenial/15.10 Wily/14.04 Trusty/12.04 Precise/Linux Mint 18/17.x/13/other related Ubuntu derivatives
To install F.lux in Ubuntu/Linux Mint (Press Ctrl+Alt+T) and copy the following commands in the Terminal:


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