Originally Posted by
czarnajama
The standard ON position in my experience in England, Poland and New Zealand is DOWN, whereas in Canada and the US it is UP (based on many years of living in each of these countries). International hotel chains may do it differently, but I don't remember.
This is completely dependent on the installer or home owner that wires it. Yes, on=down is common, but on the other hand, for most bus system (KNX/EIB) switches / button interfaces, up or the top button is on/dim up by default, not down, as it would be counter-intuitive to have a light brighten when pressing the down button, and dim when pressing the up button.