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[TUT] Enable system level night mode/night shift/blue light filter, no root required.

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New member
Oct 26, 2020
I just got a Fire HD 10 9th gen, and I can't root it, so unfortunately I could not install f.lux. I did some googling and it turns out you can turn on androids built in night mode instead with an ABD shell command, I have no idea why Amazon makes you use their crappy blue light filter, which is really just an overlay. So anyways,
1. Plug your Fire HD into your computer
2. Start an ABD shell (I use Fire Toolbox to do this easily)
3. Paste these two commands, one at a time:
"settings put secure night_display_activated 1"
"settings put secure night_display_auto_mode 1"
4. Open settings on your Fire HD, it should say night mode is enabled at the top, click this to change the schedule to sunset to sunrise or to any time range you want.
5. Use your Fire HD at night without being blinded or washing out your screen with amazon's crappy filter.


Senior Member
Oct 14, 2010
Amazon Fire HD 8 and HD 10
Xperia XZ2
Oh NightLight does NOT show up on Screenshots!
But yes. it is indeed VERRY much better.
Thanks a lot.


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Mar 27, 2018
So, the "night mode" in settings isn't shown after reboot? Do we have to run the adb commands every time we want to make changes?

There isn't a "night mode" setting enabled there. But if you go to settings after pushing those adb commands and go in to settings, there will be a drop down from the top that says something like night mode is enabled. You can click that and set the time to activate it.