diff --git a/QSB/EchoesOfTheEye/LightSensorSync/QSBPlayerLightSensor.cs b/QSB/EchoesOfTheEye/LightSensorSync/QSBPlayerLightSensor.cs
index 41611d45..c97e818e 100644
--- a/QSB/EchoesOfTheEye/LightSensorSync/QSBPlayerLightSensor.cs
+++ b/QSB/EchoesOfTheEye/LightSensorSync/QSBPlayerLightSensor.cs
@@ -1,19 +1,63 @@
-using System;
+using QSB.Player;
+using QSB.WorldSync;
 using System.Collections.Generic;
 using UnityEngine;
 
 namespace QSB.EchoesOfTheEye.LightSensorSync;
 
-[RequireComponent(typeof(LightSensor))]
+/// <summary>
+/// stores a bit of extra data needed for player light sensor sync
+/// </summary>
+[RequireComponent(typeof(SingleLightSensor))]
 public class QSBPlayerLightSensor : MonoBehaviour
 {
-	private LightSensor _lightSensor;
-	private void Awake() => _lightSensor = GetComponent<LightSensor>();
+	private SingleLightSensor _lightSensor;
 
 	internal bool _locallyIlluminated;
-
-	public Action OnDetectLocalLight;
-	public Action OnDetectLocalDarkness;
-
 	internal readonly List<uint> _illuminatedBy = new();
+
+	private void Awake()
+	{
+		_lightSensor = GetComponent<SingleLightSensor>();
+
+		RequestInitialStatesMessage.SendInitialState += SendInitialState;
+		QSBPlayerManager.OnRemovePlayer += OnPlayerLeave;
+	}
+
+	private void OnDestroy()
+	{
+		RequestInitialStatesMessage.SendInitialState -= SendInitialState;
+		QSBPlayerManager.OnRemovePlayer -= OnPlayerLeave;
+	}
+
+	private void SendInitialState(uint to)
+	{
+		// todo send the messages
+	}
+
+	private void OnPlayerLeave(PlayerInfo player) => SetIlluminated(player.PlayerId, false);
+
+	public void SetIlluminated(uint playerId, bool locallyIlluminated)
+	{
+		var illuminated = _illuminatedBy.Count > 0;
+		if (locallyIlluminated)
+		{
+			_illuminatedBy.SafeAdd(playerId);
+		}
+		else
+		{
+			_illuminatedBy.QuickRemove(playerId);
+		}
+
+		if (!illuminated && _illuminatedBy.Count > 0)
+		{
+			_lightSensor._illuminated = true;
+			_lightSensor.OnDetectLight.Invoke();
+		}
+		else if (illuminated && _illuminatedBy.Count == 0)
+		{
+			_lightSensor._illuminated = false;
+			_lightSensor.OnDetectDarkness.Invoke();
+		}
+	}
 }
diff --git a/QSB/WorldSync/RequestInitialStatesMessage.cs b/QSB/WorldSync/RequestInitialStatesMessage.cs
index 16a3ba76..85d2ed2a 100644
--- a/QSB/WorldSync/RequestInitialStatesMessage.cs
+++ b/QSB/WorldSync/RequestInitialStatesMessage.cs
@@ -23,5 +23,9 @@ public class RequestInitialStatesMessage : QSBMessage
 		DebugLog.DebugWrite($"sent initial states to {to}");
 	}
 
+	/// <summary>
+	/// called on the host.
+	/// use this to send initial states to whoever is asking for it.
+	/// </summary>
 	public static event Action<uint> SendInitialState;
 }