Very glad it's working for you. So far the general consensus is a mixed bag, but there are all manner of causes for less-than-ideal user experiences. Nice to hear a strong positive one!
Automated color shifting with time-of-day is a relatively new thing, but I've done it manually in the past, during times when my eyes were acting up or I was doing lots of late-night work. It's a good thing, and thanks for the links to f.lux.
“and thanks for the links to f.lux.”
Flux will be in your taskbar tray on the far right. It is easier and quicker to grab onto and adjust the color temperatures. But, as posted, I also use the Windoz 11 “app” for red shift too. Under display properties.