Abstract: Electronic lighting ballast in a facility intentionally presents a non-unity power factor load to an inductive or capacitive power supply, such a capability being used to correct the power factor for a larger facility employing different types of loads. Electronic lighting ballast is also used to intentionally generate specified harmonics of a certain phase and amplitude to a power source, and further, the method, apparatus and system uses such a capability to cancel undesirable harmonics generated by other equipment in a larger facility. A method of employing a communications protocol between an electronic ballast and a facility control or monitoring system, such that the system can communicate with many adjustable ballast's in a facility, and direct the ballast's, collectively or individually, to change their power factor or light output status or harmonic characteristics.