Four. One to change the bulb, three to stand around so he has someone to hi-five after.
None they'd rather keep their clients in the dark.
None, change comes from within.
One. They stick the bulb in the socket and wait for the world to revolve around them!
Just one. He holds the bulb and the room spins.
Why does it have to be a group activity?
Two, two... One, two.
One, but it takes 7 years.
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.
It was too tired.
Amburgers & Woot Beer! Edit: Thanks to my dad for this one.
They might give you Hi-V back!
None, they prefer natural light