Abstract <p>This model simulates an electrodeless lamp with argon/mercury chemistry. The low excitation threshold for mercury atoms means that even though the mercury is present in small concentrations, its interaction with electrons determines the overall discharge characteristics. here is strong UV emission from the plasma at 185 and 253 nm stemming from spontaneous decay of electronically excited mercury atoms. From an electrical point of view, the lamp can be thought of as a transformer, where the coil acts as the primary and the plasma acts as the secondary. Two dimensional (2D), time dependent finite element simulations of the magnetic field, electron density, and temperature distribution for an argon/mercury gas ICP, by applying a variable power of 90, 100, and 110 W to the coil set-up was performed. In a comparative study, the effect of the power variation on the plasma parameters was investigated and the corresponding results are demonstrated.</p>