I have a printer that has Ethernet LAN and Wi-Fi WLAN. The printer is seldom used, so I'm interested in minimizing idle power consumption.
My Wi-Fi AP is on anyway, so that's not interesting.
My first guess would be that a wired LAN connection would use less power, because there's not so much power lost "in space". But on the other hand, I vaguely remember that at least gigabit Ethernet sends a constant signal or something, while Wi-Fi only sends something if there is something to send?
So how should I connect my printer to minimize idle power usage? If Ethernet, would it make any difference if I reconfigure the ethernet link to 100 Mbit/s or even 10 Mbit/s?