Sorry to raise this thread from the dead, but I saw the comments on it and that I had never finished it up and wanted to add (for anyone looking in the future) that I found a better solution than trying to set up a bunch of automations/scripts/etc, I just used the Circadian add on, which lets you mix and match brightness/color temp/etc. It’s not as ideal as the solution I envisioned, where I could basically add a temp slider to bulbs that only have brightness control, but it is much, MUCH easier; like 15 minutes of setup/config.