Five. One to handle the bulb and 4 to contemplate how David Sanborn would've done it.
Just one, but it will take 4 episodes.
You only get 4 fingers in a Kitkat.
Four. One to change the bulb and three to make a t-shirt about it.
One but the bulb will have to spend four hours in the waiting room.
None: Taureans don't like to change anything.
Pi
Less than twelve parsecs.
A witch in a garbage can.
Because he had nothing to chauffeur.
Lay awake, contemplating the existence of Dog.