None. They glow in the dark.
None, they arrest the room because it's black.
Two. Obviously.
One. No, two! No, four! No, eight! No, sixteen! No, thirty-two! ...
Just one, but they get extra credits for it
Dumblebore
The punch line.
Its not that hard
NONE! ITS A SECRET GOVERNMENT PLOT TO KEEP US IN THE DARK!"
Because Chernobyl fall-out.
Because Chernobyl fall out
None. People that glow in the dark don't need lights.
None. People who glow in the dark don't need lightbulbs.