diff --git a/src/pocketmine/level/light/LightUpdate.php b/src/pocketmine/level/light/LightUpdate.php
index a2c4bc45e1..3fb90130c0 100644
--- a/src/pocketmine/level/light/LightUpdate.php
+++ b/src/pocketmine/level/light/LightUpdate.php
@@ -59,8 +59,24 @@ abstract class LightUpdate{
 
 	abstract protected function getLight(int $x, int $y, int $z) : int;
 
+	/**
+	 * @param int $x
+	 * @param int $y
+	 * @param int $z
+	 * @param int $level
+	 *
+	 * @return void
+	 */
 	abstract protected function setLight(int $x, int $y, int $z, int $level);
 
+	/**
+	 * @param int $x
+	 * @param int $y
+	 * @param int $z
+	 * @param int $newLevel
+	 *
+	 * @return void
+	 */
 	public function setAndUpdateLight(int $x, int $y, int $z, int $newLevel){
 		$this->updateNodes[Level::blockHash($x, $y, $z)] = [$x, $y, $z, $newLevel];
 	}
@@ -84,6 +100,9 @@ abstract class LightUpdate{
 		}
 	}
 
+	/**
+	 * @return void
+	 */
 	public function execute(){
 		$this->prepareNodes();
 
@@ -137,6 +156,14 @@ abstract class LightUpdate{
 		}
 	}
 
+	/**
+	 * @param int $x
+	 * @param int $y
+	 * @param int $z
+	 * @param int $oldAdjacentLevel
+	 *
+	 * @return void
+	 */
 	protected function computeRemoveLight(int $x, int $y, int $z, int $oldAdjacentLevel){
 		$current = $this->getLight($x, $y, $z);
 
@@ -157,6 +184,14 @@ abstract class LightUpdate{
 		}
 	}
 
+	/**
+	 * @param int $x
+	 * @param int $y
+	 * @param int $z
+	 * @param int $newAdjacentLevel
+	 *
+	 * @return void
+	 */
 	protected function computeSpreadLight(int $x, int $y, int $z, int $newAdjacentLevel){
 		$current = $this->getLight($x, $y, $z);
 		$potentialLight = $newAdjacentLevel - BlockFactory::$lightFilter[$this->subChunkHandler->currentSubChunk->getBlockId($x & 0x0f, $y & 0x0f, $z & 0x0f)];