Need Help: diagnosing, what should I be looking for in the logs

I’ve read the:

And have looked at a light switch that just went on by itself a couple of days ago. But when looking at the Event List and then the actual Event where the switch went on, I’m not quite clear what I am looking for to determine the “why?”

The description just says “Playroom Lights switch is on”. Well, thanks, I know that! I want to know why at 2:43 am this light switch went on all by itself with no rule or smart app doing it.