Nun.
By holding the bulb up to the socket and waiting for the world to revolve around them.
The same number it takes to screw public confidence in law enforcement
Nun
A nun with a javelin through her head.
More storage space.
Because of the culture!
None, because they keep on asking why all of the other light bulbs in the house aren't being changed at the same time.
Trick question. Protesters never change anything.
Force of habit.
Namaste