LED rope lights
 

I'm not a shill. I've been watching some hobby videos where they've been using these, and they look like a really cool solution to some of the unique lighting problems on more modern vehicles

Led rope lights

LED Filament 130mm / 300mm 3V Flexible Filament For DIY Decorative Lamp
https://a.aliexpress.com/_mPyrhsq
Warm white, Cool white, Red, Blue, Green, Pink

LED filliment 38mm DC3V DC12V LED for lighting DIY
https://a.aliexpress.com/_mPshEg2
Warm white, Cool white, Red, Blue, Green