Unity create light GO

 using UnityEngine;
 using System.Collections;
 
 public class changecolor : MonoBehaviour 
 {
     public Color[] colors;
     private Vector3 positionxyz;
     public Color Rcolor;
 
     void OnTriggerEnter(Collider other)
     {
         Rcolor = colors[Random.Range(0, colors.Length)];
         gameObject.renderer.material.color = Rcolor;
         positionxyz = transform.position;
         GameObject lightC = new GameObject();
         lightC.name = "discolight";
         lightC.AddComponent<Light>();
         lightC.transform.position = positionxyz;
         lightC.light.color = Rcolor;
         lightC.light.range = 2.579712f;
         lightC.light.intensity = 1;
         lightC.light.renderMode = LightRenderMode.ForcePixel;
 
     }
     void OnTriggerExit(Collider other)
     {
         Destroy(GameObject.Find("discolight"));
     }
 }