Interesting, thanks for sharing those articles. redshift lets you adjust brightness in addition or instead of color temperature (there is a Windows version but it is command line only, doesn't look like it supports macs and does not work with Wayland). Someone mentioned brightness a while back and I've been adjusting both since then but I'll try just adjusting brightness and see how it works. If nothing else, it is possible that warm color temperatures might end up being similar to the issue with flashlights where full spectrum lets you use a lower brightness than red light (of course, with flashlights there is also the issue that many "red" flashlights, even some that advertise as being night vision preserving, aren't in the right range to actually preserve night vision). It does seem like I could lower the brightness a bit more without the warmer color temperature.

https://github.com/jonls/redshift

There's a GUI redshift for Windows: https://github.com/maoserr/redshiftgui/downloads

if anyone is interested, Michael from f.lux provided some great info in relation to the study the above links are referencing when it was originally posted on HN:

https://news.ycombinator.com/item?id=21916679