Light Ballast, Fluorescent (PCB-containing)

Light ballasts are the electrical components at the end of fluorescent light fixtures under a metal overplate. Prior to 1978, ballasts were commonly manufactured with PCBs in the capacitor oil and in a tar-like substance that surrounds ballast components called "potting compound." Ballasts made after 1978 are usually marked "Non-PCB." Ballasts containing PCBs must be managed as a hazardous waste.