diff --git a/core/src/main/java/mc/core/world/block/BlockLocation.java b/core/src/main/java/mc/core/world/block/BlockLocation.java
index e5220c5..a4bfc49 100644
--- a/core/src/main/java/mc/core/world/block/BlockLocation.java
+++ b/core/src/main/java/mc/core/world/block/BlockLocation.java
@@ -23,9 +23,17 @@ public class BlockLocation implements Cloneable {
 
     public BlockLocation toGlobal(ChunkSection chunkSection) {
         return new BlockLocation(
-                (chunkSection.getX() << 8) + x,
-                (chunkSection.getY() << 8) + y,
-                (chunkSection.getZ() << 8) + z
+                (chunkSection.getX() << 4) + x,
+                (chunkSection.getY() << 4) + y,
+                (chunkSection.getZ() << 4) + z
+        );
+    }
+
+    public BlockLocation toLocal() {
+        return new BlockLocation(
+                x - (x >> 4 << 4),
+                y - (y >> 4 << 4),
+                z - (z >> 4 << 4)
         );
     }
 
diff --git a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java
index 86ea7d7..2223ad9 100644
--- a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java
+++ b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java
@@ -184,14 +184,12 @@ public class ChunkDataPacket implements SCPacket {
         private TIntList palette = new TIntArrayList();
         private int dataItems = 0;
         private ByteArrayOutputNetStream dataArray = new ByteArrayOutputNetStream();
-        private ByteArrayOutputNetStream blockLight = new ByteArrayOutputNetStream();
+        private NibbleArray blockLight = new NibbleArray();
         private NibbleArray skyLight = new NibbleArray();
 
         private int idxHalfLong = 0;
-        private int idxHalfByte1 = 0;
 
         private long dataValueCompacted = 0;
-        private int blockLightCompacted = 0;
 
         private int serializeBlockState(BlockType blockType) {
             return (blockType.getId() << 4) | blockType.getMeta();
@@ -230,14 +228,7 @@ public class ChunkDataPacket implements SCPacket {
             }
 
             // block light data
-            if (idxHalfByte1 == 0) {
-                blockLightCompacted = block.getLight();
-                idxHalfByte1++;
-            } else {
-                blockLightCompacted = (blockLightCompacted << 4) | block.getLight();
-                blockLight.writeByte(blockLightCompacted);
-                idxHalfByte1 = 0;
-            }
+            blockLight.set(block.getLocation().toLocal(), block.getLight());
         }
 
         void addSkyLight(int x, int y, int z, int value) {
@@ -256,7 +247,7 @@ public class ChunkDataPacket implements SCPacket {
             netOutputStream.writeBytes(dataArray.toByteArray()); // Data Array
             //     </Data Array>
             //     <Block Light>
-            netOutputStream.writeBytes(blockLight.toByteArray());
+            netOutputStream.writeBytes(blockLight.getRawData());
             //     </Block Light>
             //     <Sky Light>
             netOutputStream.writeBytes(skyLight.getRawData());