cloned lights question

could anyone of U people tell me why there is a difference between treating with cloned objects and cloned lights? I mean when a SHIFT+D an object and I edit any of the “brothers” same comes back to all of them, not with lights, why is that? When I change any settings in the cloned light, nothing transfers to its original.
Thanx cheers

Wait a second, you’re saying you cloned an object using SHIFT+D and when you edit one of them the other is edited as if it were an instance. That’s just pure wrong, cause instances in Blender are achieved with ALT+D, that’s the duplicate instance shortcut, and it works fine for objects or Lamps.