The Meaning of a Light Switch

All knowledge is physically instantiated, but it comes in layers. So you can say level above, do you mean emergent? Yes. For a light switch, it's very simple and there's like only one or two levels between the state of the light switch and the actual light being on or off. With the more complicated things like light switches that have microprocessors in them or computers or brains, the relationship between physical states of the information object and their meaning can be very complicated.