We're not sure, they've yet to see the light.
Just one. They are very efficient and don't have much of a sense of humor.
Only one, but with a perticular FETISH
Two, one to change the lightbulb, and the other to bask in the light of the old one.
A hundred but they'll all be competing to be the one to change the bulb and bring light to the world.
They're afraid of change.
One.
The heretic kept crossing the warp