Hi,
Lights are attached to a node and they only enlight children node of this node.
So if you load the scene, attach it to root, and then attach your model to root. Then it won’t receive light from scene.
Often I post-load the scene, and attach its light to root.
To use the blender loader at runtime (bad practice) you should include the jme-plugins as dependency (iirc).
PS: I’m working on an other pipeline jme-blender (mainly to import my scene) take a look at [devlog] jme3 as blender renderer - #10 by nehon . And ask me if you want to give it a try.