Electronic ballasts used in fluorescent lighting systems can experience high failure rates, due to the fact that the ballast manufacturer may not have considered all failure mechanisms or provided ...

In part 1 we discussed rectifying the ballast AC current to DC and we showed an open load protection circuit. Direct replacement of fluorescent tubes with LED assemblies can lead to uneven lighting.

With all of the excitement surrounding LEDs these days, one might say high-intensity discharge (HID) lamps are out of the limelight. But though LEDs get most of the headlines, HID sources are still ...