unity:

public class createlight : MonoBehaviour {

	public GameObject clight;//创建一个游戏物体变量，存放物体
	public Light jglight;
	public GameObject qiu;


	// Use this for initialization
	void Start () {
		
		//这个方法 new GameObject();  可以创建一个新物体
		clight=new GameObject("clight01");
		clight.transform.position = new Vector3 (0,5f,0);//给灯定义一个方向
		jglight=clight.AddComponent ();  //添加灯组件
		jglight.type = LightType.Spot;
		jglight.intensity = 10f;
		jglight.color = Color.yellow;

	}
	
	// Update is called once per frame
	void Update () {
		if (Input.GetKeyDown ("space")) {
			new GameObject("clight02");
		}
		jglight.transform.LookAt (qiu.transform.position);
	}
}