f.lux is an app that adjusts the color temperature of your screen automatically throughout the day to better match natural light. Electronic devices use screens with very intense blue light which has been found to affect quality of sleep.
Run these commands in a terminal to install it:
sudo add-apt-repository ppa:nathan-renniewaldock/flux sudo apt-get update sudo apt-get install fluxgui
After installation, type f.lux into the search box to locate the f.lux indicator applet and launch it.
You’ll need to fill in your latitude and longitude, or zip code. I did both.
The default color temperature is halogen. If you click Preview you’ll see a brief example of the color temperature shifting. Don’t be surprised if it seems really orange at first. It always starts out at the max and then adjusts slowly. Start with Halogen and forget about it for a week or a month and then experiment with other settings if you want.
f.lux will start automatically by default. There will be an icon in the menu bar by the clock. You can click on it to get into the preferences and also pause f.lux temporarily if you’re doing some work that needs accurate colors such as photo editing.