@Override
    public void simpleUpdate(float tpf){
        angle += tpf;
        angle %= FastMath.TWO_PI;
        
        pl.setPosition(new Vector3f(FastMath.cos(angle) * 3f, 0.5f, FastMath.sin(angle) * 3f));
        lightMdl.setLocalTranslation(pl.getPosition());
    }
Checks two-sided lighting capability.

@author Kirill Vainer
jme3-examples/src/main/java/jme3test/light/TestTwoSideLighting.java