Failing to detect X,Y,Z Locations of GameObject

Hi guys!

Ive got this code, thats suppose to move a lantern toward the player and down to imitate a running effect, once it reaches a certain point, its suppose to stop which it is failing to do. (I will also add functionality for it to bob once i get this simple mechanic down pat)

Thanks!

Script:

 var posZ = -0.5948148;
 var posY = -0.6899948;
 private var moveSpeed = 0.1;
 private var orgSpeed = 0.1;
 
 var lantern : Transform;
 
 function Update () {
     
     if ( Input.GetKey(KeyCode.LeftShift) ) {
         
         if (lantern.position.z >= posZ && lantern.position.y <= posY) {
             moveSpeed = 0;
             Debug.Log("STOPPED");
         } else {
             lantern.position.z += moveSpeed * Time.deltaTime;
             lantern.position.y -= moveSpeed * Time.deltaTime;
         }
         
     }
     
 }