The emergency ballast automatically performs code-required 30-sec monthly and 90-min annual testing. If a problem is detected, an indicator light and an optional audible alarm let maintenance ...

When your fluorescent light flickers or makes a loud and annoying hum, a degrading ballast could be the cause. Replacing a ballast is easier than you think, but ballasts can be expensive, so ...

To test it, install a working fluorescent tube and a new starter. If the light malfunctions, the ballast is at fault and must be replaced.

Today's lighting systems need ballast control functions to drive compact fluorescent lamps, adding cost and requiring more design time.