Nun.
Only one. They just hold it still and wait for the world to revolve around them.
One. ###And it's NOT funny!!!
Just one she hokds the blub and the world revolves around her.
It depends on the definition of lightbulb.
Edit: I'm so sorry.
Gingerbread. Edit: This is more of an out-loud joke. So, maybe it'll help if it read: "Ginger-bred" instead.
Make a backup, I need to re-format this.
RAR