vintage american industrial ceiling mount interior "explosion proof" factory pendant light fixture fabricated by the killark manufacturing co., st. louis, mo. the "weatherproof" white ceramic medium base socket and light bulb are protected by an impact resistant bulbous clear glass globe, reinforced with a galvanized steel wire cage or bulbguard. the pendant light is supported by a single galvanized steel threaded end pole or pipe with ball and socket (i.e., pivoting) ceiling cap or canopy.