None. They will never find one that burned as brightly as the first one.
or
Billllyuns and billllyuns. Light bulbs are part of the interstellar "goo" that pervades our universe; they are star stuff.
or
To give us some sort of appreciation for flutes.
Did you hear about that music composer who committed suicide? He didn't even leave a note.
or
The same thing Arkansas.
or