
When the light does not light up or works intermittently, many people often think of a broken bulb or an unstable power source, but ignore a key part in the circuit, which is the ballast. This device keeps the current stable, helping the light to shine evenly and last longer over time. However, not everyone understands what a ballast is, how it works, and how to check if a problem occurs. Using a VOM meter to check the ballast is an effective way, not too complicated if you know how to observe and operate correctly.









