Treasure hunting in the dark

Once in a while, when my sim walks into a different room, the lights might not turn on like they usually do.  Everything in the room still behaves like I would normally expect it to, but I just can’t see anything because the room is dark.  Today this happened to Delia while she was treasure hunting in Egypt.

With the shadow effects on Delia, it almost looks like she’s sporting a little 5-o’clock shadow.  Whoops!