我发现同一类型光源只能显示最后创建的，是故意设计成这样的吗？但我需要在场景内添加多个光源，我的场景很小，需要即时演算。

测试效果见图：

以下是我的全部测试代码：
(function(){
    Laya3D.init(0, 0, true);
    Laya.stage.scaleMode = Laya.Stage.SCALE_FULL;
    Laya.stage.screenMode = Laya.Stage.SCREEN_NONE;

    var scene = Laya.stage.addChild(new Laya.Scene());

    var camera = scene.addChild(new Laya.Camera(0, 0.1, 100));
    camera.transform.translate(new Laya.Vector3(3, 8, 10));
    camera.transform.lookAt(new Laya.Vector3(0, 0, 0), new Laya.Vector3(0, 1, 0));
    camera.clearColor = new Laya.Vector3(0.3, 0.3, 0.5);
    camera.addComponent(CameraMoveScript);

    //创建点光[左下角]------------ 这个不生效，除非注释掉light2
    var light1 = scene.addChild(new Laya.PointLight());
    light1.transform.translate(new Laya.Vector3(-10,3,0));//移动灯光位置
    light1.range = 99;//设置点光照亮范围
    light1.color = new Laya.Vector3(1, 0, 0);// 设置光的颜色
    light1.attenuation = new Laya.Vector3(0.01,0.01,0.01);//设置点光的衰减


    //创建点光[右下角]------------- 最新创建的光源可以生效
    var light2 = scene.addChild(new Laya.PointLight());
    light2.transform.translate(new Laya.Vector3(10,3,0));//移动灯光位置
    light2.range = 99;//设置点光照亮范围
    light2.color = new Laya.Vector3(0, 1, 0);// 设置光的颜色
    light2.attenuation = new Laya.Vector3(0.01,0.01,0.01);//设置点光的衰减



    //创建平行光1
    var light3 = scene.addChild(new Laya.DirectionLight());
    light3.direction = new Laya.Vector3(0.5, -1, 0);
    light3.color = new Laya.Vector3(0, 1, 1);



    //创建平行光2
    var light4 = scene.addChild(new Laya.DirectionLight());
    light4.direction = new Laya.Vector3(-1, -1, -1);
    light4.color = new Laya.Vector3(1, 1, 0);


    var sprite3D = scene.addChild(new Laya.Sprite3D());

    //添加自定义模型
    var box = sprite3D.addChild(new Laya.MeshSprite3D(new Laya.BoxMesh(1, 1, 1)));
    box.transform.position = new Laya.Vector3(0, 0.5, 0);
    var material = new Laya.StandardMaterial();
    //降低反射率，加强反射贴图反射
    material.albedo = new Laya.Vector4(0.8, 0.8, 0.8, 0);
    material.diffuseTexture = Laya.Texture2D.load("images/bg03.png");
    box.meshRender.material = material;

    //平面
    var plane = sprite3D.addChild(new Laya.MeshSprite3D(new Laya.PlaneMesh(15, 15, 1, 1)));
    plane.transform.position = new Laya.Vector3(0, 0, 0);
    var material2 = new Laya.StandardMaterial();
    //降低反射率，加强反射贴图反射
    material2.albedo = new Laya.Vector4(0.8, 0.8, 0.8, 0);
    material2.diffuseTexture = Laya.Texture2D.load("images/bg02.png");
    plane.meshRender.receiveShadow=true;
    //为box模型赋材质
    plane.meshRender.material = material2;

    
    Laya.timer.loop(10, this, loopfun);
    function loopfun() {
        if(!camera || !box){
            return;
        }
        camera.transform.lookAt(box.transform.position, new Laya.Vector3(0, 1, 0), false);
    }
})();
纹理图片：