After years of research and development, radio frequency light sources are just now becoming a mainstream lighting option. RF light sources follow the same principles of converting electrical power into visible radiation as conventional gas discharge lamps. The fundamental difference between RF lamps is that RF lamps operate without electrodes [anode and cathode].There are three practical ways to energize RF light sources, though there are more ways to create RF plasmas. These three ways correspond to different types of interaction of electromagnetic fields with the bounded plasma and to different kinds of RF discharges. They are: capacitive, inductive and wave sustained discharges. The most suitable frequency range is 2.2 - 3.0 MHz [2.65MHz is the standard] for RF lighting devices. An RF generator (RF ballast) is the essential yet most expensive part of a modern RF lighting system.