Shader to ilet scene lights illuminate spatial mesh?

For several AR projects I'm looking for a way to cast light (standard unity lights) onto a spatial mesh. Something similar to how shadows are casted onto spatial meshes (for example the mobileARshadow shader), but then for light and shadows. Is this possible? I'm no shader guy

The effect a light would have onto the AR background would be an additive effects.

The mobile ar shadows shader:
https://github.com/Unity-Technologi...Examples/Common/Shaders/MobileARShadow.shader