diff --git a/language.version b/language.version
index f25c4fc22..95a5a536f 100644
--- a/language.version
+++ b/language.version
@@ -1,3 +1,3 @@
 [default]
-SWWM_MODVER="\chSWWM \czGZ\c- \cw1.2pre r71 \cu(Fri  3 Dec 12:27:34 CET 2021)\c-";
-SWWM_SHORTVER="\cw1.2pre r71 \cu(2021-12-03 12:27:34)\c-";
+SWWM_MODVER="\chSWWM \czGZ\c- \cw1.2pre r72 \cu(Sat  4 Dec 21:50:50 CET 2021)\c-";
+SWWM_SHORTVER="\cw1.2pre r72 \cu(2021-12-04 21:50:50)\c-";
diff --git a/zscript/swwm_common_fx.zsc b/zscript/swwm_common_fx.zsc
index 36623b146..81827b711 100644
--- a/zscript/swwm_common_fx.zsc
+++ b/zscript/swwm_common_fx.zsc
@@ -15,7 +15,7 @@ Class PaletteLight : PointLight
 	}
 	private void UpdateLight()
 	{
-		int index = clamp(255-((255*ReactionTime)/abs(InitialReactionTime)),0,255);
+		int index = clamp(255-((255*ReactionTime)/InitialReactionTime),0,255);
 		args[LIGHT_RED] = pal[index].r;
 		args[LIGHT_GREEN] = pal[index].g;
 		args[LIGHT_BLUE] = pal[index].b;
@@ -23,7 +23,6 @@ Class PaletteLight : PointLight
 	override void PostBeginPlay()
 	{
 		Super.PostBeginPlay();
-		InitialReactionTime = ReactionTime;
 		String palname = GetTag();
 		int sep = palname.IndexOf(",");
 		int palnum = 0;
@@ -43,9 +42,10 @@ Class PaletteLight : PointLight
 		}
 		if ( ReactionTime < 0 )
 		{
-			ReactionTime = -ReactionTime;
+			ReactionTime = abs(ReactionTime)-1;
 			IsLooping = true;
 		}
+		InitialReactionTime = ReactionTime;
 		UpdateLight();
 	}
 	override void Tick()