anchor.diff:  	create_lighting_overlays()
   
   /datum/controller/process/lighting/doWork()
  -	for(var/datum/light_source/L in lighting_update_lights)
  +	var/list/lighting_update_lights_old = lighting_update_lights //We use a different list so any additions to the update lists during a delay from scheck() don't cause things to be cut from the list without being updated.
  +	lighting_update_lights = list()
  +
  +	for(var/datum/light_source/L in lighting_update_lights_old)
   		if(L.needs_update)
   			if(L.destroyed || L.check() || L.force_update)
   				L.remove_lum()
  
positive.code: 
  /datum/controller/process/lighting/setup()
  	name = "lighting"
  	schedule_interval = LIGHTING_INTERVAL
  
negative.code: 
  		scheck()
  
  	var/list/lighting_update_overlays_old = lighting_update_overlays //Same as above.
  	lighting_update_overlays = list()
  
  	for(var/atom/movable/lighting_overlay/O in lighting_update_overlays_old)
  		if(O.needs_update)
  			O.update_overlay()
  			O.needs_update = 0
  
  		scheck()
  