Two, but I don't know how they got in there.
Spacebook. (It's a terrible joke I know).
Because they don't want the world to know!
If it's their lightbulb, none of your damn business.
None, the room is already lit.
Two. One to screw it in and one to complain that it's electrified.
How many do you want?
They cell it.
BeeBee guns