Ok, here's a website that has more lightbulb jokes that you can imagine. I think they cover all the bases, here are a couple pertinent examples:

Q: How many lexicographers does it take to change a lightbulb ?
A: Two. One to change it and one to protest that he should have changed it to "light bulb".

Q: How many merkins does it take to replace a light-bulb?
A: One, if you screw 'em in tight enough.

Q: How many Hobbits does it take to change a lightbulb?
A: 1 to complain that the lightbulb isn't working, 5 to hold a meeting to decide what to do about it, 20 to form an expedition to the fabled Lightbulb Mines of Mythrill, 30 to throw a going-away party, 1 to ask Gandalf for directions, 1 to sell into slavery when the directions aren't stuck to, and they end up in entirely the wrong part of the country, and ready cash runs low, 5 get lost through natural wastage (bandits, murderers, monsters, etc,) 1 to be thrown to the Dragon that guards the Lightbulb hoarde, 1 to be thrown to the dragon to cover the retreat, 2 to carry the box of lightbulbs, 5 to find a large, sword-wielding barbarian to escort them home with the lightbulbs, another 30 to throw a safe-return party, 5 to get rid of the barbarian, who in typical style, got drunk at the party, 5 to find an Elf in the neighbourhood tall enough to change the lightbulb, one elf, and 5 to compose ballads of derring-do, heroism, sacrifice and lightbulbs. A grand total of 118.



http://www.laughnet.net/archive/jokes/lightbul.htm