diff --git a/src/main/java/appeng/core/settings/TickRates.java b/src/main/java/appeng/core/settings/TickRates.java
index 87137244c..9a1990ef0 100644
--- a/src/main/java/appeng/core/settings/TickRates.java
+++ b/src/main/java/appeng/core/settings/TickRates.java
@@ -47,7 +47,7 @@ public enum TickRates
 
 	ItemTunnel( 5, 60 ),
 
-	LightTunnel( 5, 120 ),
+	LightTunnel( 5, 60 ),
 
 	OpenComputersTunnel( 1, 5 ),
 
diff --git a/src/main/java/appeng/parts/p2p/PartP2PLight.java b/src/main/java/appeng/parts/p2p/PartP2PLight.java
index 0c177ff52..33fa44cb8 100644
--- a/src/main/java/appeng/parts/p2p/PartP2PLight.java
+++ b/src/main/java/appeng/parts/p2p/PartP2PLight.java
@@ -55,7 +55,7 @@ public class PartP2PLight extends PartP2PTunnel<PartP2PLight> implements IGridTi
 	}
 
 	private int lastValue = 0;
-	private float opacity = -1;
+	private int opacity = -1;
 
 	public PartP2PLight( final ItemStack is )
 	{
@@ -81,15 +81,21 @@ public class PartP2PLight extends PartP2PTunnel<PartP2PLight> implements IGridTi
 	{
 		super.writeToStream( data );
 		data.writeInt( this.isOutput() ? this.lastValue : 0 );
+		data.writeInt( this.opacity );
 	}
 
 	@Override
 	public boolean readFromStream( final ByteBuf data ) throws IOException
 	{
 		super.readFromStream( data );
+		final int oldValue = this.lastValue;
+		final int oldOpacity = this.opacity;
+
 		this.lastValue = data.readInt();
+		this.opacity = data.readInt();
+
 		this.setOutput( this.lastValue > 0 );
-		return false;
+		return lastValue != oldValue || oldOpacity != this.opacity;
 	}
 
 	private boolean doWork()
@@ -126,14 +132,15 @@ public class PartP2PLight extends PartP2PTunnel<PartP2PLight> implements IGridTi
 	@Override
 	public void onNeighborChanged( IBlockAccess w, BlockPos pos, BlockPos neighbor )
 	{
-		this.opacity = -1;
-
-		this.doWork();
-
-		if( this.isOutput() )
+		if( this.isOutput() && pos.offset( this.getSide().getFacing() ).equals( neighbor ) )
 		{
+			this.opacity = -1;
 			this.getHost().markForUpdate();
 		}
+		else
+		{
+			this.doWork();
+		}
 	}
 
 	@Override
@@ -168,10 +175,6 @@ public class PartP2PLight extends PartP2PTunnel<PartP2PLight> implements IGridTi
 	public void readFromNBT( final NBTTagCompound tag )
 	{
 		super.readFromNBT( tag );
-		if( tag.hasKey( "opacity" ) )
-		{
-			this.opacity = tag.getFloat( "opacity" );
-		}
 		this.lastValue = tag.getInteger( "lastValue" );
 	}
 
@@ -179,7 +182,6 @@ public class PartP2PLight extends PartP2PTunnel<PartP2PLight> implements IGridTi
 	public void writeToNBT( final NBTTagCompound tag )
 	{
 		super.writeToNBT( tag );
-		tag.setFloat( "opacity", this.opacity );
 		tag.setInteger( "lastValue", this.lastValue );
 	}
 
@@ -219,7 +221,7 @@ public class PartP2PLight extends PartP2PTunnel<PartP2PLight> implements IGridTi
 	@Override
 	public TickRateModulation tickingRequest( final IGridNode node, final int ticksSinceLastCall )
 	{
-		return this.doWork() ? TickRateModulation.FASTER : TickRateModulation.SLOWER;
+		return this.doWork() ? TickRateModulation.URGENT : TickRateModulation.SLOWER;
 	}
 
 	public float getPowerDrainPerTick()
diff --git a/src/main/java/appeng/parts/reporting/AbstractPartReporting.java b/src/main/java/appeng/parts/reporting/AbstractPartReporting.java
index 2bb3c4216..dcef800de 100644
--- a/src/main/java/appeng/parts/reporting/AbstractPartReporting.java
+++ b/src/main/java/appeng/parts/reporting/AbstractPartReporting.java
@@ -70,7 +70,7 @@ public abstract class AbstractPartReporting extends AEBasePart implements IPartM
 
 	private byte spin = 0; // 0-3
 	private int clientFlags = 0; // sent as byte.
-	private float opacity = -1;
+	private int opacity = -1;
 
 	public AbstractPartReporting( final ItemStack is )
 	{
@@ -128,10 +128,6 @@ public abstract class AbstractPartReporting extends AEBasePart implements IPartM
 	public void readFromNBT( final NBTTagCompound data )
 	{
 		super.readFromNBT( data );
-		if( data.hasKey( "opacity" ) )
-		{
-			this.opacity = data.getFloat( "opacity" );
-		}
 		this.spin = data.getByte( "spin" );
 	}
 
@@ -139,7 +135,6 @@ public abstract class AbstractPartReporting extends AEBasePart implements IPartM
 	public void writeToNBT( final NBTTagCompound data )
 	{
 		super.writeToNBT( data );
-		data.setFloat( "opacity", this.opacity );
 		data.setByte( "spin", this.getSpin() );
 	}
 
@@ -172,6 +167,7 @@ public abstract class AbstractPartReporting extends AEBasePart implements IPartM
 		}
 
 		data.writeByte( (byte) this.getClientFlags() );
+		data.writeInt( this.opacity );
 	}
 
 	@Override
@@ -179,9 +175,13 @@ public abstract class AbstractPartReporting extends AEBasePart implements IPartM
 	{
 		super.readFromStream( data );
 		final int oldFlags = this.getClientFlags();
+		final int oldOpacity = this.opacity;
+
 		this.clientFlags = data.readByte();
+		this.opacity = data.readInt();
+
 		this.spin = (byte) ( this.getClientFlags() & 3 );
-		if( this.getClientFlags() == oldFlags )
+		if( this.getClientFlags() == oldFlags && this.opacity == oldOpacity )
 		{
 			return false;
 		}
diff --git a/src/main/java/appeng/tile/networking/TileCableBus.java b/src/main/java/appeng/tile/networking/TileCableBus.java
index 7b1d7f46f..81dce258f 100644
--- a/src/main/java/appeng/tile/networking/TileCableBus.java
+++ b/src/main/java/appeng/tile/networking/TileCableBus.java
@@ -83,13 +83,14 @@ public class TileCableBus extends AEBaseTile implements AEMultiTile, ICustomColl
 	protected boolean readFromStream( final ByteBuf data ) throws IOException
 	{
 		final boolean c = super.readFromStream( data );
-		final boolean ret = this.getCableBus().readFromStream( data );
+		boolean ret = this.getCableBus().readFromStream( data );
 
 		final int newLV = this.getCableBus().getLightValue();
 		if( newLV != this.oldLV )
 		{
 			this.oldLV = newLV;
 			this.world.checkLight( this.pos );
+			ret = true;
 		}
 
 		this.updateTileSetting();
@@ -189,7 +190,6 @@ public class TileCableBus extends AEBaseTile implements AEMultiTile, ICustomColl
 		{
 			this.oldLV = newLV;
 			this.world.checkLight( this.pos );
-			// world.updateAllLightTypes( xCoord, yCoord, zCoord );
 		}
 
 		super.markForUpdate();