Romanians to Change Lightbulb

Q: How many Romanians does it take to change a lightbulb?
A: None. Ceaucescu restricted them to use only one 40 watt bulb per family to save electricity.

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.

Yankees to Screw In Light Bulb

Q: How many yankees does it take to screw in an lightbulb
A   None. Thats what rednecks are for.