I would like this icon to either show the statues of the light (on/off) or be click-able to turn of the light. Or both.
I find light lister very slow and has some issues with instanced lights (maybe it needs a refactor?).
This should work for all types of (built in) lights.

The "Light On" column just clutters the view and takes up unnecessary space when the majority of objects in the scene are not lights.
