(All primary lighting is now courtesy of the regular 120/208/240v
> utility grid feeding fluorescent fixtures. There's a modest amount of
> incandescent stuff around for small areas.
Is it true that some subway 110V incandescent light fixtures used left-hand threads to deter bulb snatchers?
[TELECOM Digest Editor's Note: I know that in Chicago long ago, all the station lighting and platform lighting they did left hand threads to inhibit people from stealing the bulbs if they needed them at their own houseand also the voltage was sufficiently different the bulbs generally would not work in your home electrical outlets anyway. PAT]