Ambient Lights
AmbientLight extends the Light class 
  - 
    Light rays aim in all directions, flooding an environment and illuminating 
      shapes evenly 
- 
    Use ambient lights to raise the overall light level 
- 
    Low ambient light makes artificial contrasty imagery 
- 
    High ambient light looks washed out 
- 
    Usually one ambient light in the scene is enough 
TransformGroup group = new TransformGroup( );
. . .
AmbientLight light = new AmbientLight( );
light.setEnable( true );
light.setColor( new Color3f( 1.0f, 1.0f, 1.0f ) );
. . .
light.setInfluencingBounds( bounds );
group.addChild( light );