Someone I follow on Twitter (@FantasyAuthor) says he still can’t figure out how many dragons it takes to screw in a lightbulb. There are some really funny people on this message board, so I thought I’d invite you to try.
Dragons don’t need lights, they see in the dark.
Seven, one for each color, unless it’s a prismatic bulb, in which case, one.
Dragon? Nonsense! There hasn’t been a dragon in these parts for a thousand years…
Only two, but they have to be really small dragons if they’re both going to fit in the lightbulb. 
Or they just set something ablaze.
Only one but the light bulb really has to want to be incinerated.
How many dragons does it take to replace a light bulb?
None, they’re not threaded to fit the socket.
Or
One but you have to screw them in real tight.
Seven: One for each surface of D&D dice.
Only one. And he works for scale.
Two: One to change it, and one to whine about how much better Hogwart’s was before it “went electric.”
Actually, they have to call Bruno Mars to do it, because he made all the dragons retire, man.
A horde.
None, they just light the nearest village on fire if they want light.
None, dragons prefer to use a knight light.
Or a REALLY big lightbulb…
How many Dragons does it take to change a light-bulb?
Just one, you just dictate how you want the job done.
“Seven for the Dwarf-lords in their halls of stone”
Just one. No wait, wait… that was pseudo-dragon.