Digital ballasts are the next step in High Intensity Discharge lighting, and give growers higher efficiency, consistent pulse-firing, and extended bulb life compared to older magnetic ballast grow lights. Thanks to solid state circuitry and fine-tuned electrical load reduction, …electronic ballasts are able to drive HPS, Metal Halide, and conversion bulbs to their fullest potential. All of our digital ballasts are UL-listed for safety. Digital Ballasts also emit less heat and noise than magnetic ballasts. For growers, this means a quieter grow space as well as reduced cooling costs. Unlike magnetic ballasts, which use a magnetic core and copper coil to regulate the power supply to your bulb, electronic ballasts use circuitry and components.