First Steps: Always Begin With the Following Disconnect main power whenever working on any electrical device. For additional protection you can also disconnect your fixture cord from your ballast (if so equipped).  Allow sufficient time for the lighting system, lamp, and ballast to cool down prior to handling. Refer to the product manual or lamp…


A ballast is an electrical device needed to operate HID (High Intensity Discharge) lamps (light bulbs). Examples of HID lamps are Metal Halide and High Pressure Sodium (HPS).