Alright

code/__DEFINES/lighting.dm

@@ -12,4 +12,4 @@
 #ifdef LIGHTING_TRANSITIONS
 #define LIGHTING_TRANSITION_SPEED (LIGHTING_INTERVAL - 1)
 #endif
-#define LIGHTING_ROUND_VALUE 1 / 128 //Value used to round lumcounts, values smaller than 1/255 don't matter (if they do, thanks sinking points), greater values will make lighting less precise, but in turn increase performance, VERY SLIGHTLY.
+#define LIGHTING_ROUND_VALUE (1 / 128) //Value used to round lumcounts, values smaller than 1/255 don't matter (if they do, thanks sinking points), greater values will make lighting less precise, but in turn increase performance, VERY SLIGHTLY.

code/game/turfs/turf.dm

@@ -37,7 +37,9 @@
 		spawn( 0 )
 			src.Entered(AM)
 			return
-	return
+
+	if(!dynamic_lighting)
+		luminosity = 1
 
 // Adds the adjacent turfs to the current atmos processing
 /turf/Del()

code/modules/lighting/light_source.dm

@@ -60,15 +60,14 @@
 		if(top_atom != source_atom)
 			if(!top_atom.light_sources) top_atom.light_sources = list()
 			top_atom.light_sources += src
-	lighting_update_lights += src
 
-	if(!needs_update)
+	if(!needs_update) //Incase we're already updating either way.
 		lighting_update_lights += src
 		needs_update = 1
 
 /datum/light_source/proc/force_update()
 	force_update = 1
-	if(!needs_update)
+	if(!needs_update) //Incase we're already updating either way.
 		needs_update = 1
 		lighting_update_lights += src
 
@@ -157,7 +156,11 @@
 				effect_g[T.lighting_overlay] = round(lum_g * strength, LIGHTING_ROUND_VALUE)
 				effect_b[T.lighting_overlay] = round(lum_b * strength, LIGHTING_ROUND_VALUE)
 
-				T.lighting_overlay.update_lumcount(effect_r[T.lighting_overlay], effect_g[T.lighting_overlay], effect_b[T.lighting_overlay])
+				T.lighting_overlay.update_lumcount(
+					round(lum_r * strength, LIGHTING_ROUND_VALUE),
+					round(lum_g * strength, LIGHTING_ROUND_VALUE),
+					round(lum_b * strength, LIGHTING_ROUND_VALUE)
+				)
 
 			if(!T.affecting_lights)
 				T.affecting_lights = list()
@@ -174,7 +177,11 @@
 				effect_g[L] = round(lum_g * strength, LIGHTING_ROUND_VALUE)
 				effect_b[L] = round(lum_b * strength, LIGHTING_ROUND_VALUE)
 
-				L.update_lumcount(effect_r[L], effect_g[L], effect_b[L])
+				L.update_lumcount(
+					round(lum_r * strength, LIGHTING_ROUND_VALUE),
+					round(lum_g * strength, LIGHTING_ROUND_VALUE),
+					round(lum_b * strength, LIGHTING_ROUND_VALUE)
+				)
 
 			if(!T.affecting_lights)
 				T.affecting_lights = list()
@@ -198,7 +205,7 @@
 		#endif
 
 
-	effect_r.len = 0
-	effect_g.len = 0
-	effect_b.len = 0
-	effect_turf.len = 0
+	effect_r.Cut()
+	effect_g.Cut()
+	effect_b.Cut()
+	effect_turf.Cut()

code/modules/lighting/lighting_process.dm

@@ -16,7 +16,7 @@
 
 		scheck()
 
-	lighting_update_lights.len = 0
+	lighting_update_lights.Cut()
 
 	for(var/atom/movable/lighting_overlay/O in lighting_update_overlays)
 		if(O.needs_update)
@@ -25,4 +25,4 @@
 
 		scheck()
 
-	lighting_update_overlays.len = 0
+	lighting_update_overlays.Cut()