@zc.squash
Unfortunately, the lamp group is not supported on Google Home.
but you can create scene on Yeelight APP, then sync it.
Just say “turn off/on my lights” or “turn off all lights”?
No can do.
I have more than that 4 bulbs. Saying turn on/off all lights will apply to all the lights at home, unfortunately.
So I create a scence and apply it to the 4 bulbs, then to use it use "activate " command with Google Home?