Yes, dark & shadows are what he reports, too. He starts out calling us for & escalates quickly to crying for us. I guess I assume they are nightmares, but perhaps he is just waking & getting scared.
He insists the hall light stay on, which actually makes more shadows in the room b/c of the gap under the door. I've explained that to him, but no go. He wants the hall light on. And if he wakes up & it's off, then he really does start screaming.