Are many of them 3-way switches (2 switches that control the same light)?
For those “up” and “down” aren’t anything special; for them to work the on-state of the light depends on the state of both switches (such that toggling either toggles the state of the light).
Most of the ones in my house are 3-way (though for most of the lights we only use one of the relevant pair). It’ll be interesting to see if it takes my kids longer than usual to learn the usual “up=on, down=off” rule.
Other switches in the same dwelling are oriented either way with no obvious bias towards either.
The presence of oddly oriented light switches is a red flag for other non-professional electrical work...
Are many of them 3-way switches (2 switches that control the same light)?
For those “up” and “down” aren’t anything special; for them to work the on-state of the light depends on the state of both switches (such that toggling either toggles the state of the light).
Most of the ones in my house are 3-way (though for most of the lights we only use one of the relevant pair). It’ll be interesting to see if it takes my kids longer than usual to learn the usual “up=on, down=off” rule.
Not sure. I don’t live there, I was just crashing in the apartment for a little under a week and didn’t have cause to learn all the lightswitches.