Note: I have no intention of keep this, just a concept.
Just screwing around with some EL wire. This type has a lip/flange which makes it super easy to tuck in between panels and get perfect curves/straight lines.
I don't plan on keeping it in. For now, I'm just playing with it. In person, it's not obtrusive and has a nice, soft glow.
https://m.ebay.com/itm/Neon-LED-Light-Car-Glow-EL-Wire-String-Strip-Rope-Tube-Dance-Party-Controller/191989305420?