Well, turns out one is not enough, but if you pair it, two can.
A: Just one but he wants to do it thirty-two times and when he's done everyone thinks that his last lightbulb was much better.
Whatever it says in the book.
One, but there are FOUR LIGHTS!
They said IT couldn't be done
I'm turning over a new leaf.
When it's turned into the teacher.
In case you get a hole-in-one (stolen from some girl at school)
He held up a pair of pants!
At least two, but they have to be pretty small to fit.