My drawing was only to illustrate the concept that gpa was talking about. As to how he was planning to shut everything off was not discussed in the the OP. Maybe he has a master control that shuts everything down.
Currently I have lignts blue and white[obvious day/night] white in line as well as blue in line connected both to the same strip outletbut they go through ,one of those xmas light controls ,hand held button switches.....you can sit and just push the button off on one and turn on the other .Day to night....i plan on getting dimmer switchs and put them close to control area so i cam dimm the white then put in blue for night then activate the lights in buildings ,signs and lamposts......yeah hopefully by xmas...................