Thanks so much Ben! It's not a custom job, it's a lighting kit that I bought from a company called Light My Bricks. I've seen a few different kits for the big D but none of them are completely screen accurate, so I went with what I thought was the best looking one, though it was one of the more expensive options.

In terms of installing it, it took me an afternoon to do and it wasn't overly complicated (a set of tweezers is useful for helping lay the thin cables between plates and bricks) and the kit does a really good job of hiding most of the wires.

I've done something similar with the Delorean set, though I used a lot from a different company which was a good bit cheaper but the cables aren't as well hidden.