adds 'exterior' lights (#31695)

_maps/map_files/RandomRuins/LavaRuins/lavaland_biodome_winter.dmm

@@ -284,12 +284,12 @@
 /turf/simulated/floor/pod/dark,
 /area/ruin/powered/snow_biodome)
 "hA" = (
-/obj/machinery/light/built{
+/obj/effect/mapping_helpers/no_lava,
+/obj/machinery/light/exterior/outdoors{
 	dir = 1
 	},
-/obj/effect/mapping_helpers/no_lava,
-/turf/simulated/floor/pod/dark/lavaland_air,
-/area/ruin/powered/snow_biodome)
+/turf/simulated/floor/plating/asteroid/basalt/lava_land_surface,
+/area/lavaland/surface/outdoors/explored)
 "jE" = (
 /obj/effect/decal/cleanable/blood/drip,
 /turf/simulated/floor/wood,

_maps/map_files/RandomRuins/SpaceRuins/casino.dmm

@@ -413,10 +413,8 @@
 /turf/simulated/floor/mineral/plastitanium,
 /area/ruin/space/powered/casino/security)
 "kx" = (
-/obj/machinery/light{
-	dir = 4;
-	brightness_color = "#FF0000";
-	color = "#FF0000"
+/obj/machinery/light/exterior/warning{
+	dir = 4
 	},
 /turf/template_noop,
 /area/template_noop)
@@ -466,10 +464,8 @@
 /turf/simulated/floor/plating,
 /area/ruin/space/powered/casino/security)
 "lZ" = (
-/obj/machinery/light{
-	dir = 1;
-	brightness_color = "#FF0000";
-	color = "#FF0000"
+/obj/machinery/light/exterior/warning{
+	dir = 1
 	},
 /turf/template_noop,
 /area/template_noop)
@@ -1036,10 +1032,7 @@
 /turf/simulated/floor/plating,
 /area/ruin/space/powered/casino/maints)
 "DL" = (
-/obj/machinery/light{
-	brightness_color = "#FF0000";
-	color = "#FF0000"
-	},
+/obj/machinery/light/exterior/warning,
 /turf/template_noop,
 /area/template_noop)
 "DM" = (
@@ -1514,10 +1507,8 @@
 /turf/simulated/floor/plasteel/freezer,
 /area/ruin/space/powered/casino/hall)
 "TA" = (
-/obj/machinery/light{
-	dir = 8;
-	brightness_color = "#FF0000";
-	color = "#FF0000"
+/obj/machinery/light/exterior/warning{
+	dir = 8
 	},
 /turf/template_noop,
 /area/template_noop)
@@ -1695,15 +1686,13 @@
 /turf/simulated/floor/plating,
 /area/ruin/space/powered/casino/maints)
 "Xe" = (
-/obj/machinery/light{
-	dir = 8;
-	brightness_color = "#FF0000";
-	color = "#FF0000"
-	},
 /obj/structure/lattice/catwalk,
 /obj/structure/cable{
 	icon_state = "1-4"
 	},
+/obj/machinery/light/exterior/warning{
+	dir = 8
+	},
 /turf/template_noop,
 /area/template_noop)
 "Xo" = (

code/modules/power/exterior_lights.dm

@@ -0,0 +1,38 @@
+/// Exterior lights use the powernet of the wall they're installed on,
+/// not the tile they're placed on. This allows them to be in a different
+/// area than the area that powers them, making it possible to have a light
+/// "outside" a structure that shares its power state.
+/obj/machinery/light/exterior
+
+/obj/machinery/light/exterior/Initialize(mapload)
+	. = ..()
+
+	reregister_machine()
+
+/obj/machinery/light/exterior/reregister_machine()
+	var/turf/mounted = get_step(src, dir)
+	var/area/machine_area = get_area(mounted)
+
+	if(machine_powernet?.powernet_area != machine_area)
+		if(machine_area)
+			var/old_power_mode = power_state
+			change_power_mode(NO_POWER_USE) // Take away our current power from the old network
+			machine_powernet?.unregister_machine(src)
+			machine_powernet = machine_area.powernet
+			machine_powernet.register_machine(src)
+			change_power_mode(old_power_mode) // add it to the new network
+
+/obj/machinery/light/exterior/power_change()
+	var/turf/mounted = get_step(src, dir)
+	var/area/machine_area = get_area(mounted)
+
+	if(machine_area)
+		seton(machine_area.lightswitch && machine_area.powernet.has_power(PW_CHANNEL_LIGHTING))
+
+/obj/machinery/light/exterior/outdoors
+	brightness_color = "#facd7f"
+	nightshift_light_color = "#facd7f"
+
+/obj/machinery/light/exterior/warning
+	brightness_color = COLOR_RED_LIGHT
+	nightshift_light_color = COLOR_RED_LIGHT

paradise.dme

@@ -3085,6 +3085,7 @@
 #include "code\modules\power\alien_cache.dm"
 #include "code\modules\power\cell.dm"
 #include "code\modules\power\electrolyzer.dm"
+#include "code\modules\power\exterior_lights.dm"
 #include "code\modules\power\gravitygenerator.dm"
 #include "code\modules\power\laser_terminal.dm"
 #include "code\modules\power\lights.dm"