When we bought the new light for the main floor, we bought a matching light for the second floor as well. The photo above is the old light.
A close up of the old light, complete with bug carcases.
The old light fixture removed, and the old knob & tube wiring exposed.
Enlarging the opening to install an electrical box. The old light was just screwed right into the ceiling.
The new box installed.
Prepping the wires for the new fixture.
The new light installed.
The new light works!