Three. One to hold the light bulb do and two to spin the chair
Zir holds it up to the socket and waits for the world to revolve around zirself.
Just two, but you're going to need a lot of patience and light bulbs.
Because he hasn't got a chair!..... sorry.
14,000. 1 to hold the lightbulb, 4 to hold the chair, and 13,995 to spin the house.