One of the first things I do after I install Ubuntu is turn on Night Light, the blue-light filter built into GNOME (blue light may disrupt sleep onset, cause eye fatigue and possibly age you faster).
However, I find the default temperature too warm and sepia-ry—I know; I use Ubuntu, but there is such thing as too orange—so I dial down the intensity using the Settings > Display > Night Light > Temperature slider.
For me, that’s it: set and forget.
However, some folks find they regularly re-adjust Night Light’s warmth depending on their mood, task (admittedly when I make graphics at night I turn the feature off to gauge colour), time of day, or lighting changes within the room they’re in.
Adjusting the amount of blue light filtering in GNOME isn’t a hardship, but it does require opening the Settings app each time.
It’s for those folks whom the Night Light Slider GNOME Shell extension may prove a nifty time-saver.
Does it do anything revolutionary? No.
Does it do anything that can’t be done from Settings. Also no.
What it does do is simple: bring the temperature slider out of hiding, making it accessible from the Quick Settings menu so that adjustment screen temperature is easier.
Users no longer need disrupt your workflow by launching an app window and scouring it to find the right panel (or, as I do, using the overview to search for the right setting and launching it that way) as the slider is within easy reach.
Sure, it’d be nice if this extension wasn’t necessary. GNOME could, in theory, add a temperature slider to the Night Light toggle in a sub-menu (like it does with keyboard backlight). Since that’s not the case, this third-party add-on fills the niche-ask nicely.
Night Light Slider supports GNOME 45 – 47, and it can be installed from the GNOME Extensions website (or via the third-party Extensions Manager desktop app). There’s no configuration options provided since none are needed.
So yeah: if you think you’d appreciate having that temperature intensity slider in easy reach, check it out.