We have found the definitive answer.
How many orcs does it take to screw in a lightbulb? Well, if we can all agree that:
And of course, we also hold true that:
Assuming, all the while, that:
Naturally, with the pre-defined terms of:
All of this leads us to:
So, obviously, the answer is 3 orcs. Feel free to disagree in the comments!