Port current /tg/ lighting system

code/ATMOSPHERICS/components/binary_devices/algae_generator_vr.dm

@@ -44,10 +44,10 @@
 	// TODO - Make these in actual icon states so its not silly like this
 	var/image/I = image(icon = icon, icon_state = "algae-pipe-overlay", dir = dir)
 	I.color = PIPE_COLOR_BLUE
-	overlays += I
+	add_overlay(I)
 	I = image(icon = icon, icon_state = "algae-pipe-overlay", dir = reverse_dir[dir])
 	I.color = PIPE_COLOR_BLACK
-	overlays += I
+	add_overlay(I)
 
 /obj/machinery/atmospherics/binary/algae_farm/Destroy()
 	. = ..()

code/ATMOSPHERICS/components/binary_devices/dp_vent_pump.dm

@@ -64,7 +64,7 @@
 	if(!check_icon_cache())
 		return
 
-	overlays.Cut()
+	cut_overlays()
 
 	var/vent_icon = "vent"
 
@@ -80,7 +80,7 @@
 	else
 		vent_icon += "[use_power ? "[pump_direction ? "out" : "in"]" : "off"]"
 
-	overlays += icon_manager.get_atmos_icon("device", , , vent_icon)
+	add_overlay(icon_manager.get_atmos_icon("device", , , vent_icon))
 
 /obj/machinery/atmospherics/binary/dp_vent_pump/update_underlays()
 	if(..())

code/ATMOSPHERICS/components/binary_devices/pipeturbine.dm

@@ -73,15 +73,15 @@
 		network2.update = 1
 
 /obj/machinery/atmospherics/pipeturbine/update_icon()
-	overlays.Cut()
+	cut_overlays()
 	if (dP > 10)
-		overlays += image('icons/obj/pipeturbine.dmi', "moto-turb")
+		add_overlay(image('icons/obj/pipeturbine.dmi', "moto-turb"))
 	if (kin_energy > 100000)
-		overlays += image('icons/obj/pipeturbine.dmi', "low-turb")
+		add_overlay(image('icons/obj/pipeturbine.dmi', "low-turb"))
 	if (kin_energy > 500000)
-		overlays += image('icons/obj/pipeturbine.dmi', "med-turb")
+		add_overlay(image('icons/obj/pipeturbine.dmi', "med-turb"))
 	if (kin_energy > 1000000)
-		overlays += image('icons/obj/pipeturbine.dmi', "hi-turb")
+		add_overlay(image('icons/obj/pipeturbine.dmi', "hi-turb"))
 
 /obj/machinery/atmospherics/pipeturbine/attackby(obj/item/weapon/W as obj, mob/user as mob)
 	if(W.is_wrench())