I know that certain lights within planes are used by captains to signal information to crews. For instance, I believe it's common to use "Fasten seatbelt light

I know that certain lights within planes are used by captains to signal information to crews. For instance, I believe it's common to use "Fasten seatbelt light on/off twice" to signal reaching 10,000 feet in altitude. Does anybody know if the no-smoking sign is used for any sort of signaling? (I doubt it because it doesn't make a noise, like the seatbelt signal. But, it might!)