One, but they'll take 30 visits to do it.
Just one, but the light bulb really has to want to change.
It was supposed to be in place last week!
The bear minimum
He holds the light-bulb over the socket and waits for the world to revolve around him.
A barber.
Honey I'm down at the pub having a pint with the lads. Be home in about 30 min. If I'm not back by then please read this message again.
Just one. But it takes about 8-10 visits.