well, i just asked Kuki, and she says 18

s.
thats assuming there is a person there to stack them all up- and hand the bulb to whoever is at the top- top

ideally being a lanky, big pawed teapot- to screw it in. after all, how can you expect a small pawed

to work their thumbs right!?!
what can i say, she is quite the know-it-all!!!!!