Ballasts are devices that provide the proper voltage and current needed to operate gas discharge lamps such as HID and fluorescent. They limit the current transmitted to gas discharge lamps. In this way, it does an excellent job of preventing the lamp from deteriorating by pulling the high current. DK Hardware is your go-to place if you want to buy a ballast. We have a range of ballasts from top brands with different specifications to cater to your requirements. For example, we have the impressive Keystone Technologies Preheat Electromagnetic Fluorescent Replacement Ballast. It is designed to operate a 1CFL lamp. This replacement ballast features a 120-Volt input and a high power factor design for top-class performance. The Sylvania Quicktronic Fluorescent Replacement Ballast is designed to reduce lamp flickering for use between 120-Volt and 277-Volt. It is built from durable materials for long-lasting use. If you want more information on these products, feel free to get in touch with online experts.