Depends on how clumsy you are.
One to screw it in and nine to write on their blogs about how enlightening the experiment was.
It only takes two, but the trick is getting them in the lightbulb.
None, they just beat the room for being black
One, but you can be sure a whole Reddit community will appear to expand the joke, make it funnier and eventually run it into the ground.
Depends.
It depends. Are you inside or outside?
