I have a pair of pole lights at my entrances and the poles has holes for a photocell like this.
Now that I am using a timer switch I have disconnected the photocell on each pole but the holes on the pole remain. What is a good way to plug/close the two holes?

Now that I am using a timer switch I have disconnected the photocell on each pole but the holes on the pole remain. What is a good way to plug/close the two holes?