Google Home can gently wake you up using Philips Hue lights

Engadget 

Smart lights still tend to offer a rude awakening if you tie them to your alarm, but Google wants to fix that. It's delivering a promised Gentle Sleep & Wake feature for Home speakers that gradually dims or brightens your Philips Hue lights to provide a more natural rest. Say the right command (such as "turn on Gentle Wake Up," "wake up my lights" or "sleep my lights") and the lights will change over the course of half an hour. You can set specific times if you intend to use it as part of your daily routine. The feature won't be widely available, at least not for a while.