I think the main point is you need to give your Groups an aggregation function so it will show the group state as ON when any one of the lights are ON. I think the following will work:
Group:Dimmer:MAX Bedroom_Light_Brightness
I think the main point is you need to give your Groups an aggregation function so it will show the group state as ON when any one of the lights are ON. I think the following will work:
Group:Dimmer:MAX Bedroom_Light_Brightness