Electronic ballasts can keep your lighting systems from bulb blowout. A light ballast limits the current entering bulb from the power source. Without a fluorescent light ballasts, this type of light would typically blow out in standard current. And if your fluorescent lights start to flick or hum, a ballast replacement might be the cause. We have them too. Zoro also has a great selection of CFL Ballasts, HID Ballasts, Dimming Ballasts, and Magnetic Ballasts too.