'Army time' is also European time, none of that AM/PM business here.

okay, so I want to apply it to all my lights in my castle courtyard, but how do I make it so I just edit "particular" lights instead of changing the base, because I want some lights using the same torch to stay on forever?
Pick the light you want to use, then change it's editor ID. Press OK, and when asked to 'create a new form', say 'yes.'. That way you add the script to that specific light, without applying it to the base light you started with. Then remove all the normal lights used in the castle courtyard and replace them with copies of your new scripted light object.