Well, first off, it's called a lamp...
None. Monkeys screw in trees.
Actually agents will screw in just about anything.
Two.
Two, one to change the light-bulb, and one to observe how it symbolizes an incandescent beacon of subjectivity in a netherworld of cosmic nothingness. This is courtesy of Spencer Reid.(CM)
You get light music.
Lamp post
Ohm... Ohm...