Yes I had tried but not as it should because I had not understood that the position of the light source is a percentage of the width, depth and height.
I applied this methodology to the vertices of my object and it works.

Since taking vertices into account is manual, only one shape is possible.

By generating a transparent or invisible 3D shape, the light panel is rendered opaque when it is turned on.

For the wired 3D shape, I realized that the object had to be already in the .obj file.

The TriangleMeshLightWithNoRepresentation class does not cause the expected effect.