kj wrote:
I was doing a routine lightbulb replacement in the recessed ceiling
fixture in my entrance hallway when the top of the bulb sheared
off cleanly from the threaded metal part. Great.

My favorite tool for that is needlenose pliers, with electricity shut
off, of course. Since you cannot access with pliers, I would search the
kitchen drawer for a suitable tool.....a couple of wooden chopsticks
stuck at angles into the socket, some pressure, twist. Could work. I
can't cook, but that kitchen stuff sure comes in handy )