I have scenes as well, and with the recent addition of the motion sensors and remotes (as seen in the other thread), I very rarely need to use Siri at all.
I used to use it for the kids landing nightlight "Hey siri, set the landing to 1%) - But now it’s set to come on at 19:15 every day, and then the lights turn blue at 20:00 for 5 minutes, before turning off completely at 20:05.
Once they turn blue, it’s books down and bed time!