constructor( skyColor, groundColor, intensity ) {

		super( skyColor, intensity );

		/**
		 * This flag can be used for type testing.
		 *
		 * @type {boolean}
		 * @readonly
		 * @default true
		 */
		this.isHemisphereLight = true;

		this.type = 'HemisphereLight';

		this.position.copy( Object3D.DEFAULT_UP );
		this.updateMatrix();

		/**
		 * The light's ground color.
		 *
		 * @type {Color}
		 */
		this.groundColor = new Color( groundColor );

	}
Constructs a new hemisphere light.

@param {(number|Color|string)} [skyColor=0xffffff] - The light's sky color.
@param {(number|Color|string)} [groundColor=0xffffff] - The light's ground color.
@param {number} [intensity=1] - The light's strength/intensity.