The Furman Gooseneck Lights are the perfect accessory for any Series II Power Conditioner. All of the Series II units are designed with a rear BNC connector to accommodate either a GN-I or GN-LED for rear rack illumination. These flexible 12 inch lights provide an ample amount of light and can be controlled by an on/off switch located on the front of the unit. In addition to their use with Furman Series II Power Conditioners, the versatile GN-I and GN-LED will work with a variety of other products in various applications. The replaceable head / bulb (depending on the model) provides for virtually indefinite use. Get a Furman Rack Light and see what you've been missing!