It may take a little bit of time to find the right color temperature balance that you like, but hopefully your evenings in front of the computer screen will be more bearable.
These settings will automatically save, so after you set it up you can close out of System Preferences and get back to playing around on your Mac as usual. The farther to the right you move the slider, the warmer the color temperature gets. Once you’ve chosen one, use the slider below it to choose the color temperature that you want Night Shift to use.