None, that's what interns are for.
One...but it takes him 27 tries
It only takes two, but the trick is getting them in the lightbulb.
Change a light bulb Pfft! We are game changers.
Three. One to change it while the other two argue about how old the old one is.
Scientist A: Are you sure? scientist B: Trust me, I know what i'm doing.
A conversation of energy.
God demi