It's time to go to sweep.
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
"Let me see your birth certificate".
or
Two. One to screw it in, and one to stab the other in the back and take all the credit.
or