Minor refactor to area start_lit.

Author: MistakeNot4892

code/game/area/area_abstract.dm

@@ -1,7 +1,7 @@
 /area/hallway
 	name = "hallway"
 	holomap_color = HOLOMAP_AREACOLOR_HALLWAYS
-	start_lit = TRUE
+	area_start_lit = TRUE
 
 /area/maintenance
 	area_flags = AREA_FLAG_RAD_SHIELDED

code/game/area/areas.dm

@@ -14,7 +14,7 @@ var/global/list/areas = list()
 	mouse_opacity = MOUSE_OPACITY_UNCLICKABLE
 
 	// If true, this area will force light switches on during init.
-	var/start_lit = FALSE
+	var/area_start_lit = null
 
 	// If true, will allow natural walls in this area to have xenoarchaeology finds in them.
 	var/allow_xenoarchaeology_finds = TRUE

code/modules/lights/light_switch.dm

@@ -42,12 +42,12 @@
 
 /obj/machinery/light_switch/LateInitialize()
 	. = ..()
+
 	if(isnull(on))
-		on = get_config_value(/decl/config/toggle/lights_start_on)
-	if(!on)
-		var/area/area = get_area(src)
-		if(area?.start_lit)
-			on = TRUE
+		if(isnull(connected_area?.area_start_lit))
+			on = get_config_value(/decl/config/toggle/lights_start_on)
+		else
+			on = connected_area.lightswitch
 
 	connected_area?.set_lightswitch(on)
 	update_icon()