Thanks guys! .......I also wonder if there is something there or around there that you are not seeing (or hearing or smelling).
Could the fixture be buzzing? You know that barely audible whine/hum that some electronics give off?
What does he do if you turn the lights on?
He still barks at them when they are turned on. In fact ... he is still barking at them? I will have my Dad check the attic when he comes home. It is only able to be entered through the attached garage and runs the entire 1500 square feet of the house. Maybe there is something up in there? If not ... I do not know what to make of it ... unless you believe in ghosts!? Leeo's urn is in our bedroom next to the bed and the fixture is above the bed! Lol!
It is possible for something to be in the attic. Dad leaves the trap door open and the garage door up! Hey ... it's his house! Lol!
Honestly ... I had to crate him for a bit in another room for some peace and quiet. :/
He will probably get the runs from all the treats! .........
EDIT: Do you suppose it could be him seeing his reflection? He has been doing that with the headlights on the truck for the last couple of days too .... now that I think about it. I think he is seeing his own self in the bumper and the headlights?
The light fixture is glass and round with a brass ring around it. Isn't that a bit far away to see though?