Automation to increase brightness only when a bulb in a light group is on

[KennethLavrsen]

If your lights are all zigbee based and on Deconz then this works like you want it.

Here is a good method for dimming lights in Deconz

The reason for using a Deconz group is that the deconz.configure service only works on either deconz lights or deconz groups.