Light bulb.
None, they'll just keep complimenting it and get mad when it doesn't want to screw.
It's a pretty obscure number. You probably haven't heard of it.
None. There are no light bulbs in the closet. Another one: Why is Justin Bieber so pale? Because there's no light inside the closet
None, the room is already lit.
Two. One to screw it in and one to take credit for it.
BECAUSE!!