Two. One to screw it in and one to complain that it's electrified.
One to over hype the new lightbulb and one to make sure it breaks within a year.
A: None! If you'd just make it a day exterior we wouldn't be screwing around with all these damn light bulbs!"
Five - one to hold the bulb, and four to turn his ladder
One
It doesn't matter how many you get, because all they'll do is sit around complaining about how misogynistic the use of the word "screw" is.
Three. One to post it, the second to post a better punchline in the comments, and the third to complain that it's a repost.