Pretty self explanatory, but I’ll add a few details:
Adding MTS light system to those decors would be a good idea, but normal minecraft light emitting from decors would be even better, and probably more easy as it doesn’t request any orientation nor angle.

Decor already allows for you to allow it to light up using MC's lighting system. No code work for me!
https://github.com/DonBruce64/MinecraftTransportSimulator/blob/master/main/java/minecrafttransportsimulator/dataclasses/PackDecorObject.java