Digital Ballasts, also called solid-state ballasts are the newest technology when it comes to High Intensity Discharge lighting (HID). They are known to provide significant energy savings over magnetic ballasts. Aside from greater efficiency, the voltage regulation is far superior allowing for much longer bulb life. This is an outstanding advancement in technology within the ballast manufacturing industry when considering the savings for large scale users such as municipalities. These end users will see benefits worth billions of dollars, with a 20-30% reduction in energy costs. References