The Club layout has a master timer on the layout power supply. All layout electronics, light power converters, Arduinos, etc. on same circuit.
Push button, cycles through 2,3,8,12 hour timeouts.
Layout JMRI PC is on UPS, also on same timer circuit. When powering off, UPS lets computer do controlled power down.
User friendly for club members. Only one timer to turn on. No muss, no fuss.