So,
to create a light source within a scenery object, you have to go to the lights tab in the nl2sco editor and add a new light source. When you light source and go to the settings, you can see this window:
There you can add a new light source either from a light that already exists in the model file, which you could for example do in blender, or create a new one and set the position of it in relation to the object origin. Using an existing light source is way easier tho.
Below that you can change, how far the light shines, how intense it is and the color.
On the bottom you can set a volume effect which looks like, in the premade light spot scenery object, you can find in the sco library.
One way i can think of how to switch the lights off, was to make an animation in blender, let it play in a loop, and time it according to the coaster.
Another think that should work is to use Yedrimas light animator tool. There you can trigger a set animation via a track trigger or smth like that, im not qite sure.
I hope i could help :)
