It's not a bulb it's a globe.
Two. One to hold the bulb, and one to drink until the room starts spinning.
Five. One to handle the bulb and 4 to contemplate how David Sanborn would've done it.
Zero, its already lit
Just two, but how they get in there.. I don't know. (Stolen from an old Maxim in my dad's storage)
100: One to do it and ninety-nine to say "I could've done that."
Seven - one to actually change the bulb and six to complain that they liked the old one better.