Four. One to change the bulb and three to make a t-shirt about it.
Only one. She stands with the bulb and the world revolves around her.
None. They aren't about to change a bulb when flipping a switch has worked for 15 years.
Two. The light bulb you remove and the light bulb you replace it with.
Look a squirrel!
Two! one to change the light bulb and the other to rotate the universe!
One.
Six. One to change it, one to take pictures and four to make t-shirts for the event.
A dog has a better understanding of no.