[villagetinker]

Originally Posted by ajbrown

It was the light sensor (photo cell) switch in the lamp post.

I do not do this for a living, so I do not see a lot of failures, but this is the first one I have seen fail 'open'; by open I mean the light never comes on.

Thanks for the insights, $7 and a happy neighbor....

Glad you were able to help the neighbor, I tend to do the same. I was just going to reply that the photocell units can fail either open or closed, but I see you have already solved the problem.
Good for you.