He can't help what his eyes do in the dim light of predawn, or any low light situation for that matter, with black mage as his primary. It just... happens. And has likely startled Prompto on more than one occasion. He closes his eyes for a few seconds, biting the inside of his cheek for a moment.

"Couple hours tops," he mumbles just loud enough for the other to hear. "Couldn't get back to sleep after." Not with both the thought of the night terror or Prompto's thrashing on the other side of the room, but like hell is he going to mention that.