It doesn't matter, they don't have any electricity any more.
or
A newspaper!
or
Flood lights!
or
It saw the ginger snap.
or
Billllyuns and billllyuns. Light bulbs are part of the interstellar "goo" that pervades our universe; they are star stuff.
or
In Washington, D.C.
or
Two. One to screw it in, and one to stab the other in the back and take all the credit.
or