One, but it will take 13 attempts.
Two. One to screw it in and one to film it. One, but it takes him fifty tries.
Two. One to hold the bulb, and another to spin the story until the bulb fits.
Logs on to Wikipedia*
One but the bulb will have to spend four hours in the waiting room.
They all have white vans
1/3
A *smaugasbord*.