This Insulator Glass 1 Light Incandescent Tapered Shape Swing Arm Wall Sconce by ELK will enhance your home with a perfect mix of form and function. The Insulator Glass collection was inspired by the glass relics that adorned the top of telegraph lines at the turn of the 20th century. Acting as the centerpiece of this series is the recognizable shape of the glass insulator made from thick clear glass that is complimented by solid cast hardware designed with an industrial aesthetic. Metal and glass construction Wall mount installation Number of Bulb: 1 Watts Per Bulb: 60 Total Wattage: 60 Bulb not included Voltage: 120V Bulb Base and Compatibility Bulb Base - Medium (E26): The E26 (Edison 26mm), Medium Edison Screw, is the standard bulb used in 120 Volt applications in North America. E26 is the most common bulb type and is generally interchangeable with E27 bulbs .