Six. One to turn the bulb, one for support, and four to relate to the experience.
or
1,000,001: One to change the bulb and 1,000,000 to rebuild civilization to the point where they need light bulbs again.
or
Greece!
or
Woke up in the fireplace.
or
He was a baaaaaaaaad driver.
or
At the hickory dickory dock.
or