To use only the models you can choose append from your scene and navigate to the 2 arm lamp_only.blend file and append the models by their group (2ArmLamp) or simply open the blend file and you will find the models at the center on layer 2. Scale and rotations are applied to avoid issues during editing. Lights can be switched on easily by editing the Bulbglass material. There is a switch called Light switch, if zero, the lights are off, if 1, the lights are on.