I found you, Mr Disable Random Light Updates!

CraftBukkit-Patches/0054-Allow-Disabling-of-Random-Lighting-Updates.patch

@@ -0,0 +1,38 @@
+From 2c4c883f2678a7b884bb7b135a93da0935f858a5 Mon Sep 17 00:00:00 2001
+From: md_5 <md_5@live.com.au>
+Date: Sat, 22 Jun 2013 16:12:02 +1000
+Subject: [PATCH] Allow Disabling of Random Lighting Updates
+
+
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index 5866abb..9f87b0e 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -2104,7 +2104,7 @@ public abstract class World implements IBlockAccess {
+         }
+ 
+         this.methodProfiler.a("playerCheckLight");
+-        if (!this.players.isEmpty()) {
++        if (spigotConfig.randomLightUpdates && !this.players.isEmpty()) { // Spigot
+             i = this.random.nextInt(this.players.size());
+             entityhuman = (EntityHuman) this.players.get(i);
+             j = MathHelper.floor(entityhuman.locX) + this.random.nextInt(11) - 5;
+diff --git a/src/main/java/org/spigotmc/SpigotWorldConfig.java b/src/main/java/org/spigotmc/SpigotWorldConfig.java
+index 56af938..d6d957c 100644
+--- a/src/main/java/org/spigotmc/SpigotWorldConfig.java
++++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java
+@@ -187,4 +187,11 @@ public class SpigotWorldConfig
+         hopperTransfer = getInt( "ticks-per.hopper-transfer", hopperTransfer );
+         log( "Hopper Transfer: " + hopperTransfer + " Hopper Check: " + hopperCheck );
+     }
++
++    public boolean randomLightUpdates;
++    private void lightUpdates()
++    {
++        randomLightUpdates = getBoolean( "random-light-updates", false );
++        log( "Random Lighting Updates: " + randomLightUpdates );
++    }
+ }
+-- 
+1.8.1.2
+