Also, I can't find a place to post forum bugs but when I went to enable email notifications it wouldn't let me save due to pagination settings that I assume were the defaults as I did not set them: https://i.ibb.co/KhYBKWF/Screen-Shot-2021-11-09-at-18-14-50.png

Assuming you're in the same place at night, I would just dial back the f.lux settings until things look good. FWIW: personally I do not enable True Tone because I think it is too warm during the day.

Here's the Flux "Driver info": NVIDIA 30.0.14.7212: NVIDIA GeForce GTX 1060 3GB (20210913) Generic PnP Monitor, 800 x 450mm, built 2017 Chromaticities: R=0.642578 0.332031 G=0.322266 0.623047 B=0.146484 0.055664 W=0.280273 0.290039 sRGB gamut: 95%, AdobeRGB gamut: 66% Unlimited gamma ramp=1, Internal ramp=0 Monitor 1 on NVIDIA GeForce GTX 1060 3GB Has VCGT profile=0, Gamma Ramp works=1 Windows Build: 19042.1288 It is interesting that it shows the display size improperly -- it says 800mm x 450mm, when it should be 1435mm x 800mm. Also, this TV was built in 2020, not 2017, but it may be getting the year from the Denon home theater receiver that it is connected through?

We are not totally opposed to fun! But nice explanation of the feature! I think the main question here is that we are trying to do things that seem like they will still work in 5 years, and a lot of the ways to hack into the system to do things like this seem to get limited more over time. FWIW, I think even our mission of helping sleep can be served by doing things that are more behavioral and less physiological - e.g., if we make a change that convinces you to look up and realize you are tired, it may be just as effective as dimming the screen.

@herf Ok, thank you

Thank you for the "classic f.lux" screenshot. It was only happening for this mode, but should be OK now: https://justgetflux.com/flux-setup4-121.exe

Many people dim using f.lux's software dimming (using full backlight brightness). So you get less contrast but less flicker this way. Alt+PgDn does this.

Here is the schedule f.lux gives me.

This is an option right below the Hue setting called "Allow f.lux to keep this computer awake to adjust lights." You are welcome to turn it off, but it won't work as well. Also, we do this only when the computer is plugged in (or has a nearly-full battery).

Nevermind! I spoke too soon. The issue was with a piece of anti-malware software. Sorry for the bother..

Choose "Classic f.lux" from the color selection menu in the f.lux window. Set the color to 1200K. Or, you can also set it to 800K using the keyboard shortcuts, which you can enable if they're not enabled by going into the f.lux options and turning on "Use these hotkeys to control f.lux". Change your location to somewhere in the world where the sun has already set or risen so that it's opposite you. So, if you're doing this at a time between sunrise and sunset, choose a location that's between sunset and sunrise. Change the color temperature to 1200K (or, again, you can try 800K as well). Now it no longer matters what your location is set to or what time of day it is because this sets f.lux to the exact same color temperature for both day and night, which means it will never change on you ever again - unless, of course, you change it again.

You can post f.lux options > driver info here if you'd like us to make a guess. This sounds like a power management issue, or maybe a video driver issue.

it will not work on newer android devices, due to Google's change in allowing access to screen space overlay rendering. sad. you can root and flash a kernel with K-Lapse , then use a kernel manager app to create your own custom settings according to either available light or time of day. also some native roms have night shift which is pretty similar to f.lux, just not much control over it. which phone do you have? and what rom are you running