c# light off

How would i make it so that when i start the game the light is off and not on?

 using UnityEngine;
 using System.Collections;
 
 public class LightSwitch : MonoBehaviour
 {
     
     public Light Light;
     public GameObject goLightSwitch;
     
     public AudioClip SwitchOn;
     public  AudioClip SwitchOff;
     
     private bool _switchOn;
     private GameObject _upPosition;
     private GameObject _downPosition;
     
     private AudioSource _audioSource;
 
     void Awake()
     {    
     
         _upPosition = GameObject.Find ("UpPosition");
         _downPosition = GameObject.Find ("DownPostion");
         _audioSource = gameObject.GetComponentInChildren<AudioSource>();
             
     }
     
     void OnMouseDown()
     {
          if (_switchOn)
         {
             _switchOn = false;
             goLightSwitch.transform.position = new Vector3(goLightSwitch.transform.position.x,
                                                             _downPosition.transform.position.y,
                                                            goLightSwitch.transform.position.z);
 
         
             Light.enabled = false;
             _audioSource.clip = SwitchOff;
             _audioSource.Play();
     
             
         }
         
     
         else if (!_switchOn)
         {
             _switchOn = true;
             goLightSwitch.transform.position = new Vector3(goLightSwitch.transform.position.x,
                                                             _upPosition.transform.position.y,
                                                            goLightSwitch.transform.position.z);
 
         
             Light.enabled = true;
             _audioSource.clip = SwitchOn;
             _audioSource.Play();
             
         }
     
     }
 }