Want to make appear and disappear a Light and a Particle Emiter

Hi, I have done a little script, to code a little effect of light and particles when my characters attack. Here you have:

 //variables
 public var efecto : Transform;
 public var luz : Transform;
 
 //on the code
     while (true)
     {
         var isAttacking = playerController.IsAttacking ();
         
         if (isAttacking){
             efecto.active=true;
             luz.active=true;
         }
         else{
             efecto.active =false;
             luz.active=false;
         }
         yield;
     }

But when I use this method I have a problem, Unity returns me this error:

 Assets/Scripts/Player/AttackEffectController.js(17,29): BCW0012: WARNING: 'UnityEngine.Component.active' is obsolete. the active property is deprecated on components. Please use gameObject.active instead. If you meant to enable / disable a single component use enabled instead.

What I can do? Lot of thanks in advance