None... they just shoot the room for being black.
Two. One to hold the bulb, and another to spin the story until the bulb fits.
Who wants to know?
Only one. Just as long as you hand him the damn lightbulb.
Two: One to change it, and the other one to change it back again.
You shoot the guy pushing it.
You stop laughing and shoot him again.
They both leave little boys rooms with lighter sacks.
I bet he has to leave the room.
The whole thing was a gas.
None they can't change anything.