A few times over the past month (or few months?) the fluorescent lights are on when I swear I've turned them off. When I returned home from work today, they were on. I definitely turned them off. Left for an hour or so, returned and they were on again. So now I know for certain that they are turning on by themselves.
They are fluorescent lights built into the ceiling that are connected to two different light switches. House was built in the late 1950s. Not sure how old the fixtures are. I've been here 4 years. It's possible this has been happening for longer than a month or two, but I didn't notice because I would have just assumed the other people living here left the light on. (It's now just me here.)
I have no idea what it could possibly be. Any ideas? Do I need a pro to investigate?