diff --git a/common/lc_global.h b/common/lc_global.h
index 53335edb..33fbfa04 100644
--- a/common/lc_global.h
+++ b/common/lc_global.h
@@ -107,7 +107,6 @@ struct lcMeshSection;
 struct lcRenderMesh;
 struct lcObjectSection;
 struct lcPieceInfoRayTest;
-struct lcLightProperties;
 class lcTexture;
 class lcScene;
 class lcViewManipulator;
diff --git a/common/lc_model.cpp b/common/lc_model.cpp
index 407b1344..6cb9e210 100644
--- a/common/lc_model.cpp
+++ b/common/lc_model.cpp
@@ -3092,15 +3092,6 @@ void lcModel::SetSelectedPiecesStepHide(lcStep Step)
 	}
 }
 
-void lcModel::UpdateLight(lcLight* Light, const lcLightProperties Props, int Property)
-{
-	Light->UpdateLight(mCurrentStep, Props, Property);
-
-	SaveCheckpoint(tr("Update Light"));
-	UpdateAllViews();
-	gMainWindow->UpdateSelectedObjects(false);
-}
-
 void lcModel::SetCameraOrthographic(lcCamera* Camera, bool Ortho)
 {
 	if (Camera->IsOrtho() == Ortho)
diff --git a/common/lc_model.h b/common/lc_model.h
index 144ee9f8..59bee78c 100644
--- a/common/lc_model.h
+++ b/common/lc_model.h
@@ -381,7 +381,6 @@ public:
 	void SetLightPower(lcLight* Light, float Power);
 	void SetLightCastShadow(lcLight* Light, bool CastShadow);
 	void SetLightName(lcLight* Light, const QString& Name);
-	void UpdateLight(lcLight* Light, const lcLightProperties Props, int Property);
 
 	void ShowPropertiesDialog();
 	void ShowSelectByNameDialog();
diff --git a/common/light.cpp b/common/light.cpp
index 17d3cef6..82ed4288 100644
--- a/common/light.cpp
+++ b/common/light.cpp
@@ -25,10 +25,6 @@ lcLight::lcLight(const lcVector3& Position, lcLightType LightType)
 {
 	mWorldMatrix = lcMatrix44Translation(Position);
 
-	mPOVRayLight = false;
-	mSpotExponent = 10.0f;
-	mPOVRayExponent = 1.0f;
-	
 	UpdateLightType();
 
 	mPositionKeys.ChangeKey(mWorldMatrix.GetTranslation(), 1, true);
@@ -42,8 +38,6 @@ lcLight::lcLight(const lcVector3& Position, lcLightType LightType)
 	mSpotTightnessKeys.ChangeKey(mSpotTightness, 1, true);
 	mAreaGridKeys.ChangeKey(mAreaGrid, 1, true);
 
-	mSpotExponentKeys.ChangeKey(mSpotExponent, 1, true);
-
 	UpdatePosition(1);
 }
 
@@ -126,9 +120,6 @@ void lcLight::SaveLDraw(QTextStream& Stream) const
 {
 	const QLatin1String LineEnding("\r\n");
 
-	if (mPOVRayLight)
-		Stream << QLatin1String("0 !LEOCAD LIGHT POV_RAY") << LineEnding;
-
 	if (!mCastShadow)
 		Stream << QLatin1String("0 !LEOCAD LIGHT SHADOWLESS") << LineEnding;
 
@@ -154,8 +145,6 @@ void lcLight::SaveLDraw(QTextStream& Stream) const
 	SaveAttribute(Stream, mAttenuationDistance, mAttenuationDistanceKeys, "LIGHT", "ATTENUATION_DISTANCE");
 	SaveAttribute(Stream, mAttenuationPower, mAttenuationPowerKeys, "LIGHT", "ATTENUATION_POWER");
 
-//	SaveAttribute(Stream, (mPOVRayLight ? mPOVRayExponent : mSpotExponent), mSpotExponentKeys, "LIGHT", "POWER");
-
 	switch (mLightType)
 	{
 	case lcLightType::Count:
@@ -169,7 +158,6 @@ void lcLight::SaveLDraw(QTextStream& Stream) const
 		break;
 
 	case lcLightType::Directional:
-		SaveAttribute(Stream, mSpotExponent, mSpotExponentKeys, "LIGHT", "STRENGTH");
 		break;
 
 	case lcLightType::Area:
@@ -316,20 +304,6 @@ bool lcLight::ParseLDrawLine(QTextStream& Stream)
 		}
 		else if (LoadAttribute(Stream, Token, mAreaGrid, mAreaGridKeys, "AREA_GRID"))
 			continue;
-
-//		else if (Token == QLatin1String("POWER") || Token == QLatin1String("STRENGTH"))
-//		{
-//			if (mPOVRayLight)
-//			{
-//				Stream >> mPOVRayExponent;
-//				mSpotExponentKeys.ChangeKey(mPOVRayExponent, 1, true);
-//			}
-//			else
-//			{
-//				Stream >> mSpotExponent;
-//				mSpotExponentKeys.ChangeKey(mSpotExponent, 1, true);
-//			}
-//		}
 		else if (Token == QLatin1String("TYPE"))
 		{
 			QString Type;
@@ -344,16 +318,10 @@ bool lcLight::ParseLDrawLine(QTextStream& Stream)
 				}
 			}
 		}
-		else if (Token == QLatin1String("POV_RAY"))
-		{
-			mPOVRayLight = true;
-		}
 		else if (Token == QLatin1String("SHADOWLESS"))
 		{
 			mCastShadow = false;
 		}
-		else if ((Token == QLatin1String("POWER_KEY")) || (Token == QLatin1String("STRENGTH_KEY")))
-			mSpotExponentKeys.LoadKeysLDraw(Stream);
 		else if (Token == QLatin1String("NAME"))
 		{
 			mName = Stream.readAll().trimmed();
@@ -376,29 +344,6 @@ void lcLight::CompareBoundingBox(lcVector3& Min, lcVector3& Max)
 	Max = lcMax(Point, Max);
 }
 
-void lcLight::UpdateLight(lcStep Step, lcLightProperties Props, int Property)
-{
-	switch(Property)
-	{
-	case LC_LIGHT_EXPONENT:
-		if (Props.mPOVRayLight)
-		{
-			mPOVRayExponent = Props.mSpotExponent;
-			mSpotExponentKeys.ChangeKey(mPOVRayExponent, Step, false);
-		}
-		else
-		{
-			mSpotExponent = Props.mSpotExponent;
-			mSpotExponentKeys.ChangeKey(mSpotExponent, Step, false);
-		}
-		break;
-	case LC_LIGHT_POVRAY:
-		mPOVRayLight = Props.mPOVRayLight;
-		break;
-	}
-	UpdatePosition(Step);
-}
-
 void lcLight::RayTest(lcObjectRayTest& ObjectRayTest) const
 {
 	if (IsPointLight())
@@ -679,8 +624,6 @@ void lcLight::InsertTime(lcStep Start, lcStep Time)
 	mPowerKeys.InsertTime(Start, Time);
 	mAttenuationDistanceKeys.InsertTime(Start, Time);
 	mAttenuationPowerKeys.InsertTime(Start, Time);
-
-	mSpotExponentKeys.InsertTime(Start, Time);
 }
 
 void lcLight::RemoveTime(lcStep Start, lcStep Time)
@@ -696,8 +639,6 @@ void lcLight::RemoveTime(lcStep Start, lcStep Time)
 	mPowerKeys.RemoveTime(Start, Time);
 	mAttenuationDistanceKeys.RemoveTime(Start, Time);
 	mAttenuationPowerKeys.RemoveTime(Start, Time);
-
-	mSpotExponentKeys.RemoveTime(Start, Time);
 }
 
 void lcLight::UpdatePosition(lcStep Step)
@@ -724,8 +665,6 @@ void lcLight::UpdatePosition(lcStep Step)
 	mPower = mPowerKeys.CalculateKey(Step);
 	mAttenuationDistance = mAttenuationDistanceKeys.CalculateKey(Step);
 	mAttenuationPower = mAttenuationPowerKeys.CalculateKey(Step);
-
-	mSpotExponent = mSpotExponentKeys.CalculateKey(Step);
 }
 
 void lcLight::DrawInterface(lcContext* Context, const lcScene& Scene) const
@@ -1170,9 +1109,6 @@ void lcLight::RemoveKeyFrames()
 
 	mAttenuationPowerKeys.RemoveAll();
 	mAttenuationPowerKeys.ChangeKey(mAttenuationPower, 1, true);
-
-	mSpotExponentKeys.RemoveAll();
-	mSpotExponentKeys.ChangeKey(mSpotExponent, 1, true);
 }
 
 bool lcLight::Setup(int LightIndex)
diff --git a/common/light.h b/common/light.h
index 14d598a4..32d80a0a 100644
--- a/common/light.h
+++ b/common/light.h
@@ -31,18 +31,6 @@ enum class lcLightAreaShape
 	Count
 };
 
-enum lcLightProperty
-{
-	LC_LIGHT_EXPONENT,
-	LC_LIGHT_POVRAY
-};
-
-struct lcLightProperties
-{
-	float     mSpotExponent;
-	bool      mPOVRayLight;
-};
-
 class lcLight : public lcObject
 {
 public:
@@ -326,22 +314,9 @@ public:
 	void Rotate(lcStep Step, bool AddKey, const lcMatrix33& RotationMatrix, const lcVector3& Center, const lcMatrix33& RotationFrame);
 	bool Setup(int LightIndex);
 	void CreateName(const lcArray<lcLight*>& Lights);
-	void UpdateLight(lcStep Step, lcLightProperties Props, int Property);
-
-	lcLightProperties GetLightProperties() const
-	{
-		lcLightProperties props;
-		props.mSpotExponent = mSpotExponent;
-		props.mPOVRayLight = mPOVRayLight;
-		return props;
-	}
 
 	lcMatrix44 mWorldMatrix;
 
-	bool mPOVRayLight;
-	float mSpotExponent;
-	float mPOVRayExponent;
-
 protected:
 	void UpdateLightType();
 
@@ -387,7 +362,5 @@ protected:
 	lcObjectKeyArray<float> mSpotTightnessKeys;
 	lcObjectKeyArray<lcVector2i> mAreaGridKeys;
 
-	lcObjectKeyArray<float> mSpotExponentKeys;
-
 	static constexpr float mTargetDistance = 50.0f;
 };
diff --git a/common/project.cpp b/common/project.cpp
index c83c9a4f..56b8c528 100644
--- a/common/project.cpp
+++ b/common/project.cpp
@@ -2188,7 +2188,7 @@ bool Project::ExportPOVRay(const QString& FileName)
 			const QString LightName = QString(Light->GetName()).replace(" ", "_");
 			LightType = Light->GetLightType();
 			Shadowless = Light->GetCastShadow() ? 0 : 1;
-			Power = Light->mPOVRayExponent;
+			Power = Light->GetPower();
 			FadeDistance = Light->GetAttenuationDistance();
 			FadePower = Light->GetAttenuationPower();
 
diff --git a/qt/lc_qpropertiestree.cpp b/qt/lc_qpropertiestree.cpp
index a5ebc50c..c1b89b5e 100644
--- a/qt/lc_qpropertiestree.cpp
+++ b/qt/lc_qpropertiestree.cpp
@@ -526,25 +526,6 @@ QWidget* lcQPropertiesTree::createEditor(QWidget* Parent, QTreeWidgetItem* Item)
 		return editor;
 	}
 
-	case PropertyLightFormat:
-		{
-			QComboBox *editor = new QComboBox(Parent);
-
-			editor->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLengthWithIcon);
-			editor->setMinimumContentsLength(1);
-
-			QStringList formats = { QLatin1String("Blender"), QLatin1String("POVRay") };
-			for (int i = 0; i < formats.size(); i++)
-				editor->addItem(formats.at(i), QVariant::fromValue(i));
-
-			int value = Item->data(0, PropertyValueRole).toInt();
-			editor->setCurrentIndex(value);
-
-			connect(editor, SIGNAL(currentIndexChanged(int)), this, SLOT(slotSetValue(int)));
-
-			return editor;
-		}
-
 	case PropertyColor:
 		{
 			QPushButton *Editor = new QPushButton(Parent);
@@ -830,8 +811,6 @@ void lcQPropertiesTree::slotReturnPressed()
 	{
 		if (Light)
 		{
-			lcLightProperties Props = Light->GetLightProperties();
-
 			if (Item == mLightAttenuationDistanceItem)
 			{
 				float Value = lcParseValueLocalized(Editor->text());
@@ -896,12 +875,6 @@ void lcQPropertiesTree::slotReturnPressed()
 
 				Model->SetLightPower(Light, Value);
 			}
-			else if (Item == lightExponent)
-			{
-				Props.mSpotExponent = lcParseValueLocalized(Editor->text());
-
-				Model->UpdateLight(Light, Props, LC_LIGHT_EXPONENT);
-			}
 			else if (Item == mLightNameItem)
 			{
 				QString Value = Editor->text();
@@ -962,8 +935,6 @@ void lcQPropertiesTree::slotSetValue(int Value)
 
 		if (Light)
 		{
-			lcLightProperties Props = Light->GetLightProperties();
-
 			if (Item == mLightTypeItem)
 			{
 				Model->SetLightType(Light, static_cast<lcLightType>(Value));
@@ -972,11 +943,6 @@ void lcQPropertiesTree::slotSetValue(int Value)
 			{
 				Model->SetLightAreaShape(Light, static_cast<lcLightAreaShape>(Value));
 			}
-			else if (Item == lightFormat)
-			{
-				Props.mPOVRayLight =  Value;
-				Model->UpdateLight(Light, Props, LC_LIGHT_POVRAY);
-			}
 		}
 	}
 }
@@ -1101,11 +1067,9 @@ void lcQPropertiesTree::SetEmpty()
 	cameraFar = nullptr;
 	mCameraNameItem = nullptr;
 
-	lightConfiguration = nullptr;
 	mLightColorItem = nullptr;
 	mLightPowerItem = nullptr;
 	mLightAttributesItem = nullptr;
-	lightExponent = nullptr;
 	mLightTypeItem = nullptr;
 	mLightNameItem = nullptr;
 	mLightAttenuationDistanceItem = nullptr;
@@ -1118,7 +1082,6 @@ void lcQPropertiesTree::SetEmpty()
 	mLightAreaGridYItem = nullptr;
 	mLightSizeXItem = nullptr;
 	mLightSizeYItem = nullptr;
-	lightFormat = nullptr;
 	mLightCastShadowItem = nullptr;
 	
 	mPositionItem = nullptr;
@@ -1365,8 +1328,6 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 	lcLight* Light = (Focus && Focus->IsLight()) ? (lcLight*)Focus : nullptr;
 
 	QString Name = tr("Light");
-	QString ExponentLabel = tr("Exponent");
-	QString Format, ExponentToolTip;
 	lcLightType LightType = lcLightType::Point;
 	lcLightAreaShape LightAreaShape = lcLightAreaShape::Rectangle;
 	lcVector2 LightSize(0.0f, 0.0f);
@@ -1374,11 +1335,6 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 	float Power = 0.0f;
 	float AttenuationDistance = 0.0f;
 	float AttenuationPower = 0.0f;
-	int FormatIndex = 0;
-	float Cutoff = 0.0f;
-	float Exponent = 0.0f;
-	bool EnableCutoff = false;
-	bool POVRayLight = false;
 	bool CastShadow = true;
 	lcVector3 Position(0.0f, 0.0f, 0.0f);
 	QColor Color(Qt::white);
@@ -1388,10 +1344,6 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 	{
 		Name = Light->GetName();
 
-		POVRayLight = Light->mPOVRayLight;
-		FormatIndex = static_cast<int>(POVRayLight);
-		Format = POVRayLight ? QLatin1String("POVRay") : QLatin1String("Blender");
-
 		CastShadow = Light->GetCastShadow();
 		Position = Light->GetPosition();
 		Color = lcQColorFromVector3(Light->GetColor());
@@ -1400,49 +1352,15 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 		AttenuationPower = Light->GetAttenuationPower();
 		SpotConeAngle = Light->GetSpotConeAngle();
 		SpotPenumbraAngle = Light->GetSpotPenumbraAngle();
+		SpotTightness = Light->GetSpotTightness();
 
 		LightType = Light->GetLightType();
 		LightAreaShape = Light->GetAreaShape();
 		LightSize = Light->GetSize();
 		AreaGrid = Light->GetAreaGrid();
-
-		switch (LightType)
-		{
-		case lcLightType::Point:
-			ExponentLabel = tr("Exponent");
-			break;
-
-		case lcLightType::Spot:
-			ExponentLabel = tr("Power");
-			break;
-
-		case lcLightType::Directional:
-			ExponentLabel = tr("Strength");
-			break;
-
-		case lcLightType::Area:
-			ExponentLabel = tr("Power");
-			break;
-		default:
-			break;
-		}
-
-		if (POVRayLight)
-		{
-			Exponent = Light->mPOVRayExponent;
-			ExponentToolTip = tr("Intensity of the light with typical range of 0 to 1.0.");
-		}
-		else
-		{
-			Exponent = Light->mSpotExponent;
-			ExponentToolTip = tr("Intensity of the light in watts.");
-		}
-
-		ExponentLabel = LightType == lcLightType::Directional ? tr("Strength") : tr("Power");
-		SpotTightness = Light->GetSpotTightness();
 	}
 
-	if (mWidgetMode != LC_PROPERTY_WIDGET_LIGHT || mLightType != LightType || mPOVRayLight != POVRayLight)
+	if (mWidgetMode != LC_PROPERTY_WIDGET_LIGHT || mLightType != LightType)
 	{
 		SetEmpty();
 
@@ -1455,7 +1373,7 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 		mLightColorItem->setToolTip(1, tr("Color of the emitted light."));
 
 		mLightPowerItem = addProperty(mLightAttributesItem, tr("Power"), PropertyFloat);
-		mLightPowerItem->setToolTip(1, tr("Power of the light in Watts (Blender only)."));
+		mLightPowerItem->setToolTip(1, tr("Power of the light (Watts in Blender)."));
 
 		mLightCastShadowItem = addProperty(mLightAttributesItem, tr("Cast Shadows"), PropertyBool);
 
@@ -1532,12 +1450,6 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 			break;
 		}
 
-		lightExponent = addProperty(mLightAttributesItem, ExponentLabel, PropertyFloat);
-
-		// Configuration
-		lightConfiguration = addProperty(nullptr, tr("Configuration"), PropertyGroup);
-		lightFormat = addProperty(lightConfiguration, tr("Format"), PropertyLightFormat);
-
 		mPositionItem = addProperty(nullptr, tr("Position"), PropertyGroup);
 		mPositionXItem = addProperty(mPositionItem, tr("X"), PropertyFloat);
 		mPositionYItem = addProperty(mPositionItem, tr("Y"), PropertyFloat);
@@ -1553,7 +1465,6 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 
 		mWidgetMode = LC_PROPERTY_WIDGET_LIGHT;
 		mLightType = LightType;
-		mPOVRayLight = POVRayLight;
 	}
 
 	mFocus = Light;
@@ -1607,9 +1518,6 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 	mLightAttenuationPowerItem->setData(0, PropertyValueRole, AttenuationPower);
 	mLightAttenuationPowerItem->setData(0, PropertyRangeRole, QPointF(0.0, FLT_MAX));
 
-	lightFormat->setText(1, Format);
-	lightFormat->setData(0, PropertyValueRole, FormatIndex);
-
 	mLightTypeItem->setText(1, lcLight::GetLightTypeString(LightType));
 	mLightTypeItem->setData(0, PropertyValueRole, static_cast<int>(LightType));
 
@@ -1625,10 +1533,6 @@ void lcQPropertiesTree::SetLight(lcObject* Focus)
 		mLightSizeYItem->setData(0, PropertyValueRole, LightSize[1]);
 	}
 
-	lightExponent->setText(1, lcFormatValueLocalized(Exponent));
-	lightExponent->setData(0, PropertyValueRole, Exponent);
-	lightExponent->setToolTip(1, ExponentToolTip);
-
 	switch (LightType)
 	{
 	case lcLightType::Point:
diff --git a/qt/lc_qpropertiestree.h b/qt/lc_qpropertiestree.h
index 25eae636..80f75486 100644
--- a/qt/lc_qpropertiestree.h
+++ b/qt/lc_qpropertiestree.h
@@ -49,7 +49,6 @@ public:
 		PropertyStep,
 		PropertyString,
 		PropertyStringList,
-		PropertyLightFormat,
 		PropertyColor,
 		PropertyPieceColor,
 		PropertyPart
@@ -78,7 +77,6 @@ protected:
 	void SetMultiple();
 
 	lcLightType mLightType;
-	bool mPOVRayLight;
 
 	lcPropertyWidgetMode mWidgetMode;
 	lcObject* mFocus;
@@ -115,11 +113,9 @@ protected:
 	QTreeWidgetItem* cameraFar;
 	QTreeWidgetItem* mCameraNameItem;
 
-	QTreeWidgetItem* lightConfiguration;
 	QTreeWidgetItem* mLightColorItem;
 	QTreeWidgetItem* mLightPowerItem;
 	QTreeWidgetItem* mLightAttributesItem;
-	QTreeWidgetItem* lightExponent;
 	QTreeWidgetItem* mLightTypeItem;
 	QTreeWidgetItem* mLightAttenuationDistanceItem;
 	QTreeWidgetItem* mLightAttenuationPowerItem;
@@ -132,7 +128,6 @@ protected:
 	QTreeWidgetItem* mLightSizeXItem;
 	QTreeWidgetItem* mLightSizeYItem;
 	QTreeWidgetItem* mLightNameItem;
-	QTreeWidgetItem* lightFormat;
 	QTreeWidgetItem* mLightCastShadowItem;
 
 	QTreeWidgetItem* mPositionItem;