Three. One to change it while the other two argue about how old the old one is.
None, they don't use light bulbs. They live in caves and use no forms of artificial energy because they wouldn't want to be perceived as hypocrites or morons.
fixed) 100. 1 to change it and 99 to stand around and complain about how they coulda done a better job.
Two. One to hold the bulb, and one to drink until the room starts spinning.
None, because they keep on asking why all of the other light bulbs in the house aren't being changed at the same time.
Kurt Fossil
Someone whose career is in ruins.
Seven - one to actually change the bulb and six to complain that they liked the old one better.
His old one wouldn't let him swab her poop deck.