How to Fix a Fluorescent Light

Fluorescent light bulb including its fixture base beside a mirror.

In This Article: Replacing a Fluorescent Ballast Replacing a Fluorescent Light Starter Inside a fluorescent light, electricity is delivered to a ballast, which sends a spark through the mercury-vapor-filled tube (or bulb), creating light by activating phosphors that coat the inside of the tube. If any of the components are faulty, the light won’t work […]