Hello.

I am setting a number of exterior lights and fires that need to start burning at about 2000 hours and go off at 0400 hours. How would I do this?

Make one of the light sources per cell a persistent reference, give it a name and link any other sources in the same cell with 'enable parent'. Put this script on the light source:

scn LightScriptNamebegin gamemodeif gamehour >= 20 || gamehour <= 4  if getdisabled == 1    enable  endifelseif getdisabled == 0disableendifend

If you have lights where one light is an on and the other one is an off version you need to put them on top of each other and set the status of the child to 'Set enable state to opposite of parent' in the enable parent tab.