Twelve. One to change the bulb and eleven to do the paperwork.
A hundred but they'll all be competing to be the one to change the bulb and bring light to the world.
It's not a bulb it's a globe.
None, they just watch it burn out and follow it around for 30 years.
None, because they can't change anything.
None it is done by the automatic pilot.
"Nobody said I needed doubles on that!"