diff --git a/examples/iotdashboard/LightDisplay.cpp b/examples/iotdashboard/LightDisplay.cpp
index 25a6f24f..42dd8713 100644
--- a/examples/iotdashboard/LightDisplay.cpp
+++ b/examples/iotdashboard/LightDisplay.cpp
@@ -43,10 +43,6 @@ LightDisplay::LightDisplay( QQuickItem* parent )
     setAlignmentHint( ValueText, Qt::AlignRight );
 
     setBoundaries( 0, 100 );
-
-    // ### move to Skin:
-    setShadow( { 0, 20 } );
-    setShadowColor( 0xe5e5e5 );
 }
 
 bool LightDisplay::isPressed() const
@@ -54,17 +50,6 @@ bool LightDisplay::isPressed() const
     return hasSkinState( Pressed );
 }
 
-void LightDisplay::setShadow( const QskShadowMetrics& shadow )
-{
-    m_shadow = shadow;
-    update();
-}
-
-const QskShadowMetrics& LightDisplay::shadow() const
-{
-    return m_shadow;
-}
-
 void LightDisplay::setGradient( const QskGradient& gradient )
 {
     m_gradient = gradient;
@@ -76,17 +61,6 @@ const QskGradient& LightDisplay::gradient() const
     return m_gradient;
 }
 
-void LightDisplay::setShadowColor( const QColor& color )
-{
-    m_shadowColor = color;
-    update();
-}
-
-QColor LightDisplay::shadowColor() const
-{
-    return m_shadowColor;
-}
-
 void LightDisplay::mousePressEvent( QMouseEvent* event )
 {
     QRectF handleRect = subControlRect( LightDisplay::Knob );
diff --git a/examples/iotdashboard/LightDisplay.h b/examples/iotdashboard/LightDisplay.h
index 9aa7f0b6..9049a5b3 100644
--- a/examples/iotdashboard/LightDisplay.h
+++ b/examples/iotdashboard/LightDisplay.h
@@ -22,15 +22,9 @@ class LightDisplay : public QskBoundedValueInput
 
     bool isPressed() const;
 
-    void setShadow( const QskShadowMetrics& );
-    const QskShadowMetrics& shadow() const;
-
     void setGradient( const QskGradient& );
     const QskGradient& gradient() const;
 
-    void setShadowColor( const QColor& );
-    QColor shadowColor() const;
-
   protected:
     void mousePressEvent( QMouseEvent* e ) override;
     void mouseMoveEvent( QMouseEvent* e ) override;
diff --git a/examples/iotdashboard/LightDisplaySkinlet.cpp b/examples/iotdashboard/LightDisplaySkinlet.cpp
index 27760636..6c6308bc 100644
--- a/examples/iotdashboard/LightDisplaySkinlet.cpp
+++ b/examples/iotdashboard/LightDisplaySkinlet.cpp
@@ -137,18 +137,7 @@ QSGNode* LightDisplaySkinlet::updateSubNode(
         }
         case GrooveRole:
         {
-            const QRectF grooveRect = display->subControlRect( LightDisplay::Groove );
-            if ( grooveRect.isEmpty() )
-                return nullptr;
-
-            const auto& shadowMetrics = display->shadow();
-            const auto shadowRect = shadowMetrics.shadowRect( grooveRect );
-
-            auto shadowNode = QskSGNode::ensureNode< QskBoxShadowNode >( node );
-            shadowNode->setShadowData( shadowRect, grooveRect.width() / 2,
-                shadowMetrics.blurRadius(), display->shadowColor() );
-
-            return shadowNode;
+            return updateBoxNode( skinnable, node, LightDisplay::Groove );
         }
         case ColdAndWarmArcRole:
         {
diff --git a/examples/iotdashboard/Skin.cpp b/examples/iotdashboard/Skin.cpp
index a4212949..0b86a7c3 100644
--- a/examples/iotdashboard/Skin.cpp
+++ b/examples/iotdashboard/Skin.cpp
@@ -260,6 +260,11 @@ void Skin::initHints( const Palette& palette )
 
     ed.setGradient( LightDisplay::Panel, palette.box );
     ed.setGradient( LightDisplay::Knob, palette.box );
+    ed.setShadowMetrics( LightDisplay::Groove, { 0, 20 } );
+    ed.setShadowColor( LightDisplay::Groove, palette.shadow );
+    ed.setGradient( LightDisplay::Groove, palette.box );
+    ed.setBoxShape( LightDisplay::Groove, 100, Qt::RelativeSize );
+
     ed.setGradient( RoundButton::Panel, palette.roundButton );
     ed.setGradient( RoundButton::Panel | QskAbstractButton::Pressed, palette.roundButtonPressed,
                     { QskStateCombination::CombinationNoState, RoundButton::Top } );
@@ -297,7 +302,7 @@ Skin::Palette NighttimeSkin::palette() const
         0xff1a1a1a,
         0xff0c0c0c,
         Qt::white,
-        0xff1a1a1a,
+        0xff4a4a4a,
         { { { 0.0, 0xff666666 }, { 0.5, 0xff222222 }, { 1.0, 0xff333333 } } },
         0xff222222,
     };