One.
Just two. One to explain to the public that everything possible is being done to solve the problem, and the other to screw the lightbulb into the water faucet.
Only one as the rest of the world simply MUST revolve around them...
None. It will happen itself.
None. They just shoot the room for being black.
The salesperson says, "It's $1000." The WASP says, "I'll take it."
Two. Ant-Man and Wasp are the only ones small enough to fit inside a lightbulb.