Added the project.

Assets/LightOverride/LightOverride.cs

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+using UnityEngine;
+
+public abstract class LightOverride : MonoBehaviour
+{
+
+	[Header("Overrides")]
+	public float m_IntensityMult = 1.0f;
+	[MinValue(0.0f)]
+	public float m_RangeMult = 1.0f;
+
+	public enum Type{None, Point, Tube, Area, Directional}
+
+	Type m_Type = Type.None;
+	bool m_Initialized = false;
+	Light m_Light;
+	TubeLight m_TubeLight;
+	AreaLight m_AreaLight;
+
+	public bool isOn
+	{
+		get
+		{
+			if (!isActiveAndEnabled)
+				return false;
+
+			Init();
+
+			switch(m_Type)
+			{
+				case Type.Point: return m_Light.enabled || GetForceOn();
+				case Type.Tube: return m_TubeLight.enabled || GetForceOn();
+				case Type.Area: return m_AreaLight.enabled || GetForceOn();
+				case Type.Directional: return m_Light.enabled || GetForceOn();
+			}
+
+			return false;
+		}
+
+		private set{}
+	}
+
+	new public Light light {get{Init(); return m_Light;} private set{}}
+	public TubeLight tubeLight {get{Init(); return m_TubeLight;} private set{}}
+	public AreaLight areaLight {get{Init(); return m_AreaLight;} private set{}}
+
+	public Type type {get{Init(); return m_Type;} private set{}}
+
+	// To get the "enabled" state checkbox
+	void Update()
+	{
+
+	}
+
+	public abstract bool GetForceOn();
+
+	void Init()
+	{
+		if (m_Initialized)
+			return;
+
+		if ((m_Light = GetComponent<Light>()) != null)
+		{
+			switch(m_Light.type)
+			{
+				case LightType.Point: m_Type = Type.Point; break;
+				case LightType.Directional: m_Type = Type.Directional; break;
+				default: m_Type = Type.None; break;
+			}
+		}
+		else if ((m_TubeLight = GetComponent<TubeLight>()) != null)
+		{
+			m_Type = Type.Tube;
+		}
+		else if ((m_AreaLight = GetComponent<AreaLight>()) != null)
+		{
+			m_Type = Type.Area;
+		}
+
+		m_Initialized = true;
+	}
+}

Assets/LightOverride/LightOverride.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 74f38ff2229b3664e979e3a59d7ace3f
+timeCreated: 1452857267
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: