One. No, two! No, four! No, eight! No, sixteen! No, thirty-two! ...
Two. One to take out the bulb and drop it, and the other to try and sell it before it crashes.
Lightbulb.
Just two, but they'd have to be really small.
They can't, it'd be much too cramped. How would they even get in there in the first place?
Two-thirty-nine. One more and it'd be too farty.
A: Just one but he wants to do it thirty-two times and when he's done everyone thinks that his last lightbulb was much better.