I've been doing it with Hue schedules too for a while. The Hue app does have automations support of rules based on Sunrise and Sunset. It's not quite as smart a

I've been doing it with Hue schedules too for a while. The Hue app does have automations support of rules based on Sunrise and Sunset. It's not quite as smart as HomeKit adaptive lighting because you can not, say, turn off lights during sunrise and expect them to wakeup in your post-sunset mood at the right hour, but if you are automating all lighting with the Hue hub alone and never using switches, it seems to work just fine.