Name The Set

How about, "the set of things mentioned in the classic puzzle 'if there are three lightbulbs in one room, and three light switches in another room that control the three lightbulbs...'"

Failing that wild guess, how about are any of these in the set:

wire
fuse
energy

Originally posted by ddebened
How about, "the set of things mentioned in the classic puzzle 'if there are three lightbulbs in one room, and three light switches in another room that control the three lightbulbs...'"

Failing that wild guess, how about are any of these in the set:

wire
fuse
energy

is it a holiday set?