Ten: one to screw it in and nine to say, "Pssh, I can do that."
None its already lit sam hahahah ssoooohh
The bear minimum
None, that's what students are for.
Are easily threaded by one person, with one hand. Doot.
It's not a bulb it's a globe.
One, but it takes at least three light bulbs.
Pay for the pizza.
Eventually the savings bond will mature and begin to earn money.