S Viemeister wrote
Tim Watts wrote
Lieutenant Scott wrote

Filaments use a fortune in electricity and are very hot so tend to damage the light socket.

What?? I have never seen a heat damaged lamp socket.

I have. Three pendant sockets - they were like that when we moved in.
But I suspect the previous owner had used heat lamps in them.

You dont have to use heat lamps in them, just have them vertical
and have high power bulbs in them, and low quality bakelite sockets.

There is a reason you can buy ceramic sockets, particularly in ES format.