"I was in Cincinnati. That's where Zion lives. He should be visiting Pol right now if you want to go catch up to him and question him," Cas said as he took the lamp into the living room and found an empty plug for it in a darker corner. "Sure, if you want to. It's not very interesting though."
Making sure all the lights were off, Cas turned on the hideously bright light therapy lamp and sat down in front of it. He was cross legged with his arms behind him bracing him back and looking up at a dark spot, doing everything he could to keep his eyes open. That was what Zion told him to do - the eyes were the important part.