One's a spineless, poisonous blob. The other is a form of sea life.
or
With tomato paste.
or
None. They will never find a bulb that burns as brightly as the old one.
or
In sundae school.
or
The batter.
or
Three:
One to write the light bulb removal program,
one to write the light bulb insertion program, and
one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.
or