diff --git a/Tactical/Interface.cpp b/Tactical/Interface.cpp
index 11b599a8d..320e9afc2 100644
--- a/Tactical/Interface.cpp
+++ b/Tactical/Interface.cpp
@@ -2483,7 +2483,7 @@ BOOLEAN DrawCTHIndicator()
 					fLaserBonus = gGameCTHConstants.LASER_PERFORMANCE_BONUS_SCOPE;
 
 				// light level influences how easy it is to spot the laser dot on the target
-				FLOAT fBrightnessModifier = 1.0 - ( (FLOAT)(bLightLevel - SHADE_MAX) / (FLOAT)(SHADE_MIN - SHADE_MAX) );
+				FLOAT fBrightnessModifier = (FLOAT)(bLightLevel) / (FLOAT)(NORMAL_LIGHTLEVEL_NIGHT);
 
 				// laser fully efficient
 				if ( gCTHDisplay.iBestLaserRange > d2DDistance )
diff --git a/Tactical/LOS.cpp b/Tactical/LOS.cpp
index 8616cd339..59a5fc3a1 100644
--- a/Tactical/LOS.cpp
+++ b/Tactical/LOS.cpp
@@ -7555,7 +7555,7 @@ void AdjustTargetCenterPoint( SOLDIERTYPE *pShooter, INT32 iTargetGridNo, FLOAT
 					fLaserBonus = gGameCTHConstants.LASER_PERFORMANCE_BONUS_SCOPE;
 
 				// light level influences how easy it is to spot the laser dot on the target
-				FLOAT fBrightnessModifier = 1.0 - ( (FLOAT)(bLightLevel - SHADE_MAX) / (FLOAT)(SHADE_MIN - SHADE_MAX) );
+				FLOAT fBrightnessModifier = (FLOAT)(bLightLevel) / (FLOAT)(NORMAL_LIGHTLEVEL_NIGHT);
 
 				// laser fully efficient
 				if ( gCTHDisplay.iBestLaserRange > d2DDistance )