Directional Light Point In The Same Direction As Camera

Hello,

I am trying to make it so that my directional light is pointing to wherever my camera is pointing. I have the following script.

public class LookAtTarget : MonoBehaviour {
public Transform target;

// Update is called once per frame
void Update () {
// Rotate every frame so it keeps looking at the target
transform.LookAt(target);
}
}

I drag this script onto my Directional Light and then drag a Prefab as the target, but I cannot seem to get it working.

Any advice is appreciated.
Thanks.