According to Eley et al. (1993):
Newer, more energy-efficient [electronic] ballasts...improve lamp-ballast system efficacy, measured in lumens per watt. The losses in magnetic ballasts have been reduced by substituting copper conductors for aluminum and by using higher grade magnetic components. Ballast losses may also be reduced by using a single ballast to drive three or four lamps, instead of only one or two. Careful circuit design increases efficiency of electronic ballasts. In addition, electronic ballasts, which convert the 60 Hz supply frequency to high frequency, operate fluorescent lamps more efficiently than is possible at 60 Hz. Finally, in rapid start circuits, some magnetic ballasts improve efficacy by removing power to the lamp electrodes after starting.
The electronic ballast is rapidly becoming the standard in the lighting industry. It produces significant energy and dollar savings in nearly every application for full-sized fluorescent lamps. The ballast is flicker free and produces virtually no noise or hum. [Eley et al., 1993 ref145]
In addition to the benefits of electronic ballasts already mentioned (which significantly enhance T-8 lamp operation), the electronic ballast with dimming capabilities is an integral component of any daylight harvesting or lumen maintenance strategy. These options will be discussed in detail later in the Controls section. The laboratory lighting designer may select electronic ballasts with complete confidence for most applications.
Harmonic distortion and electronic ballasts
Reliability of electronic ballasts
Electronic vs. Magnetic ballasts
