I'm a member of one of the oldest Lego Train Clubs in the world, I've been building with them for 24 years now.  We started using Brickstuff lights a couple years ago, and I've really enjoyed adding lights to the layout.

We're working on a new layout, so the plan is to have lights in every building, as well as things like lamp posts, train signals, etc.

I've even been known to help run the Brickstuff vendor booth at a few events, so maybe I've already talked to you about lights.  :-)