https://www.cnet.com/news/google-assistant-can-fade-your-philips-hue-lights-on-to-get-you-out-of-bed-ces-2019/

Starting in March, you'll be able to ask the Google Assistant to "turn on Gentle Wake Up." Doing so will sync your Hue lights with any alarms you ask the Assistant to set -- starting 30 minutes before an alarm goes off, your Hue lights will begin to fade up, simulating a gradual sunrise.

For the opposite effect -- a 30-minute sunset -- just say "OK Google, sleep the lights." You can also schedule these fades for specific times: "Hey Google, sleep the lights at 11:00 p.m." And yep, saying, "Hey Google, wake the lights at 7:00 a.m." will work as well. It all sounds pretty intuitive to me -- a good step forward for the relationship between smart lights and smart assistants.