three.js/src/lights/Light.js

/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */
 
THREE.Light = function ( color ) {

	THREE.Object3D.call( this );

	this.color = new THREE.Color( color );

};

THREE.Light.prototype = Object.create( THREE.Object3D.prototype );

THREE.Light.prototype.clone = function ( light ) {

	if ( light === undefined ) light = new THREE.Light();

	THREE.Object3D.prototype.clone.call( this, light );

	light.color.copy( this.color );

	return light;

};