Metal halide lamps comes under the category of high intensity discharge lamps which involves high intensity thermal plasma discharge phenomenon. The plasma discharge in MH lamps are different from other plasma discharge by the following characteristics: (a) the velocity of all the discharge obeys Maxwellian distribution (b) the excited energy states are occupied by Boltzmann distribution (c) composition of the plasma can be derived from local chemical equilibrium. This paper explores the temperature distribution and the immediate effects towards the life of Metal Halide lamp. The temperature profile for the Metal Halide lamp is numerically investigated. MH lamps are known to operate in two distinct modes depending upon the cathode electric field, namely – hot spot mode and diffuse mode. These two modes are basically two different modes of arc attachment of the electrodes. Since electrode plays a significant role influencing MH lamp life it becomes imperative to understand the electrodes. In this context the energy balance equation are taken into consideration. The equations are solved using Finite Element Method. The necessary boundary condition for solution of the equation is the plasma boundary layer for the cathode heat conduction. The analysis provides the temperature distribution inside the lamp for different electrode geometry.