I would like a scene activation to ignore all those lights which are already turned on and part of the scene definition. Is this possible in scenes, or how does community suggest achieving such?
I have 8 light entities in the scene, FYI
TIA
No this is not possible in scenes. Scenes are simple translators of states you define to service actions to achieve those states.
If you want to do anything more complicated (like templating the selection of entities) you will have to use a script instead, and call the services yourself.
Really writing a script instead of a scene is not that much more complicated. I did not see the point of scenes at all until the ability to define scenes on the fly was introduced.