I tried the Windows 10 built-in product, called Night Light, and switched back to f.lux because the Windows 10 solution doesn't do scheduling correctly. I had

I tried the Windows 10 built-in product, called Night Light, and switched back to f.lux because the Windows 10 solution doesn't do scheduling correctly. I had it set to switch the colors at sunset in my location, which it detected to be at 7:56p. While using my computer late one evening, I wondered why everything was still so bright and obviously not using the appropriate yellow and orange hues. I checked on the Windows settings, it told me Night Light was "off until sunset (7:56 PM)", even though it was 8:52p. So it didn't realize that 7:56 < 8:52, and that it should have already turned on Night Light. f.lux just works, Windows 10's solution does not.