Bingo!
None, that is a hardware problem.
Six: one to screw it in and five to cheer him on loudly while standing in front of other people's bulbs so no one can see them.
Get another old lady to say "BINGO!"
Depends...
Get another sweet little 80-year-old lady to yell *BINGO*!
Yell "BINGO!"
I said "Congratulations!!!"