enemy doesnt go towards small object

Im making some sort of horror game. when you click, you throw a light (sphere with point light), im trying to make it so that the enemy destroys all existing lights and then goes after the player, the thing is he runs away from them. I increased their size to 1 on all axis'(previously 0.3) and he goes after them, but very slowly. I've searched for an answer and cannot find it. EDIT: i thought it would be usefull to know the brain of my enemy; so here it is:

 public class BasicEnemyAI : MonoBehaviour {
     public GameObject Target;
     public float MoveSpeed;
     // Use this for initialization
     void Start () {
         Target = GameObject.FindGameObjectWithTag ("Player");
     }
     
     // Update is called once per frame
     void Update () {
         if (GameObject.FindGameObjectsWithTag ("PlayerLight").Length > 0) {
             transform.LookAt(GameObject.FindGameObjectsWithTag ("PlayerLight") [0].transform);
         } else {
             transform.LookAt (Target.transform);    
         }
 
             
         transform.position += transform.forward*MoveSpeed*Time.deltaTime;
 
 
             
 
     }
     void OnTriggerStay(Collider other){
 
         if (other.tag == "Player") {
             Application.LoadLevel (Application.loadedLevel);
         }
         if (other.tag == "PlayerLight") {
             Destroy (other);
         }
     }
 }