Went last year - it was awesome! It even rained a little when we first got there. We huddled under that long covered area adjacent to the rectangular pond by the entrance for about 15 minutes, then it cleared up. I think the rain made it even better because the lights were reflecting off of the rainwater on the walkways. It was cold, and it felt like Christmas!
I remember there was an hour between when the Zoo closed and when the Zoo Lights started... Parking lot was pretty crazy, but the lights made up for it! 4951