He holds it up to the socket and the world revolves around him.
One. She just holds it up there and waits for the world to revolve around her.
One. He just stands there with the lightbulb and the whole world revolves around him.
He holds the light-bulb over the socket and waits for the world to revolve around him.
One to generate a "ChangeLightBulb" event to the socket.
They have a photogenic memory.