Add existing to tracked

node_modules/@cesium/engine/Source/Scene/Light.js

@@ -0,0 +1,34 @@
+import DeveloperError from "../Core/DeveloperError.js";
+
+/**
+ * A light source. This type describes an interface and is not intended to be instantiated directly. Together, <code>color</code> and <code>intensity</code> produce a high-dynamic-range light color. <code>intensity</code> can also be used individually to dim or brighten the light without changing the hue.
+ *
+ * @alias Light
+ * @constructor
+ *
+ * @see DirectionalLight
+ * @see SunLight
+ */
+function Light() {}
+
+Object.defineProperties(Light.prototype, {
+  /**
+   * The color of the light.
+   * @memberof Light.prototype
+   * @type {Color}
+   */
+  color: {
+    get: DeveloperError.throwInstantiationError,
+  },
+
+  /**
+   * The intensity controls the strength of the light. <code>intensity</code> has a minimum value of 0.0 and no maximum value.
+   * @memberof Light.prototype
+   * @type {number}
+   */
+  intensity: {
+    get: DeveloperError.throwInstantiationError,
+  },
+});
+
+export default Light;