You can apply lights per object, if you need a common light, I usually use a family for all the objects and apply lights ACEs to the family. Look at the devlog for flat light updates and examples. You can bake on start.
The version for 3DShapes was just an experiment, in general it takes too much CPU and was a monkeypatch (hack to C3 engine.) It has been removed - I was hoping Ashley would help us adopt it and make it more efficient, but he declined.