I used to switch off the Peer to Peer LAN because of the Printers.
I have now a setting that the Printers are switched off and the PCS keep running, with the Monitors on Blanc.
As an MS in Industrial Engineering it makes sense to keep an electric current at all times on the system, especially with a Voltage/Hz - Stabilizer, BUT it must be a good system.
If the system is below 99% you may as well switch off all units if the interval to switching "on" is above 8 hours.
Below that keep the staff "On". It does not "run". It simply has current.
You can always adjust your Applications (Programs) to run at a time you want.
Basically switching "on" and "off" consumes more Power, and it works like a mechanical interference, i.e. a lever-action or similar.
People comparing it to a Candescent Lamp are wrong.
The lamp is "working" when "on". The PC is not, it is simply connected.
Any type of Monitor should be switched off, whereas LCD Monitors have (or should have) a life-span more than a human being.
Harm G. Frey