PaperMC/nms-patches/BlockRedstoneLamp.patch

--- a/net/minecraft/server/BlockRedstoneLamp.java
+++ b/net/minecraft/server/BlockRedstoneLamp.java
@@ -3,6 +3,8 @@
 import java.util.Random;
 import javax.annotation.Nullable;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public class BlockRedstoneLamp extends Block {
 
     private final boolean a;
@@ -21,6 +23,11 @@
             if (this.a && !world.isBlockIndirectlyPowered(blockposition)) {
                 world.setTypeAndData(blockposition, Blocks.REDSTONE_LAMP.getBlockData(), 2);
             } else if (!this.a && world.isBlockIndirectlyPowered(blockposition)) {
+                // CraftBukkit start
+                if (CraftEventFactory.callRedstoneChange(world, blockposition.getX(), blockposition.getY(), blockposition.getZ(), 0, 15).getNewCurrent() != 15) {
+                    return;
+                }
+                // CraftBukkit end
                 world.setTypeAndData(blockposition, Blocks.LIT_REDSTONE_LAMP.getBlockData(), 2);
             }
 
@@ -32,6 +39,11 @@
             if (this.a && !world.isBlockIndirectlyPowered(blockposition)) {
                 world.a(blockposition, (Block) this, 4);
             } else if (!this.a && world.isBlockIndirectlyPowered(blockposition)) {
+                // CraftBukkit start
+                if (CraftEventFactory.callRedstoneChange(world, blockposition.getX(), blockposition.getY(), blockposition.getZ(), 0, 15).getNewCurrent() != 15) {
+                    return;
+                }
+                // CraftBukkit end
                 world.setTypeAndData(blockposition, Blocks.LIT_REDSTONE_LAMP.getBlockData(), 2);
             }
 
@@ -41,6 +53,11 @@
     public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
         if (!world.isClientSide) {
             if (this.a && !world.isBlockIndirectlyPowered(blockposition)) {
+                // CraftBukkit start
+                if (CraftEventFactory.callRedstoneChange(world, blockposition.getX(), blockposition.getY(), blockposition.getZ(), 15, 0).getNewCurrent() != 0) {
+                    return;
+                }
+                // CraftBukkit end
                 world.setTypeAndData(blockposition, Blocks.REDSTONE_LAMP.getBlockData(), 2);
             }