- Electrical Contractor, Electrical Engineer
And those where people could reach them were usually Left Hand thread!I remember NYC had random incandescent lamps in their train terminals and tunnels.
I have a left hand thread bulb and pigtail. Hand it to someone who knows how to remove a bulb, and they have trouble. Hand it to a person not used to removing bulbs, and they unscrew it right away! Because they always try both directions!