Light Bulb - Canadians

Q: How many Canadians does it take to change a lightbulb?
A: Four. One to spray green paint onto the bulb so noone bashes it with a big stick, one to change it, one to suggest they all roll a log down a hill to celebrate, and one to invite all the others round to his log cabin so they can all watch his moose moult.

Blondes to Screw Light Bulb

Q: How many blondes does it take to screw in a light bulb?
A: None. They only screw in cars.

Light Bulb - Schizophrenic

Q: How many schizophrenics does it take to change a lightbulb?
A: Well, he thinks it's five but as we all now it's only him, so...