// Create lighting overlays on all turfs with dynamic lighting in areas with dynamic lighting.
/proc/create_all_lighting_overlays()
	for(var/area/A in world)
		if(!A.dynamic_lighting)
			continue
		for(var/turf/T in A)
			if(!T.dynamic_lighting)
				continue
			new /atom/movable/lighting_overlay(T, TRUE)
			CHECK_TICK
		CHECK_TICK