Ten: one to screw it in and nine to say, "Pssh, I can do that."
None, that's a Facilities problem.
YOU WOULDN'T KNOW SON YOU WEREN'T THERE!!
None. They just let it burn out and follow it around for twenty years.
Look for only $87 billion we can put up this chain of fluorescent satellites that will illuminate the whole planet.
There's really no sure way to know.
Twelve. Three to Physically Change the Bulb, Three to Talk About How Complicated it Was and Six to Call themselves Electricians.
2. One to screw it in and another to say, "I could do that".
Pay for the pizza.