I. Introduction
One of the strongest feature of power light-emitting diodes (LEDs) is their ability to continuously produce light output for many years of use, in contrast to most conventional light sources, forcing users to go through repeated and frequent failure-and-replacement cycles [1]. The selection of LEDs and appropriate drivers is a highly complex goal, depending on power level, efficiency, and cost factors. Also, the LED performance is mainly ruled by the reliability of the driver circuits interfacing with the utility grid that has an intermittent nature, mainly in terms of voltage stability [2].