How to change colors of all lights in a zone

Not possible by default, you have to use an app:

  1. The beforementioned < group > app comes in handy, just create a group of lights you want to control with one ‘master-light’, add all lights of a zone, and off you go. Put the group light as master-light in your zone.
  2. An Advanced virtual device has lots of possibilities for your usecase.
    Maybe the dev can create a function to control certain capabilities of a zone. Just ask here.

Check the Light Triggers app as well, might be interesting