This ultra bright, energy saving LED light is not only good for sewing, but for all sorts of activities. It uses just 5 watts of power, but is bright enough to read books in an otherwise dark room. The clamp opens to 2" wide, allowing it to be attached to many surfaces, such as tables and chairs, and the metal gooseneck allows for positioning where needed. The switch in the 55" long cord means it can be turned on and off without needing to touch the plug. Compatible with all standard North American outlets (110/120V).