This fall, right after the time change, I found myself often working intensely enough to suddenly notice "it was dark outside" in the late afternoon. Good for productivity, I suppose; not so much otherwise? ¯\_(ツ)_/¯
I'd automated a whole bunch of other light situations, mostly with some combination of brightness level (obtained from my Tempest weather station) and/or time-based. But all of those solutions were "binary" (on/off). My thought here was to slowly and incrementally bring up the overhead smart lights in my home office space.