Ceramic metal halide lamps (CMH) are a type of high-intensity discharge lamp that are used for a variety of applications, including street lighting, stadium lighting, and horticulture. In this study, we investigate the thermal behaviour of CMH lamps by solving the diffusion equation. The diffusion equation is a partial differential equation that describes the diffusion of heat through a material. By solving this equation, obtain the temperature distribution within the CMH lamp has been obtained. In this study, the finite element method has been used in MATLAB to solve the diffusion equation for a typical CMH lamp. The simulation considers the lamp’s geometry, material properties, and operating conditions. The simulation provides a temperature profile plot of the CMH lamp, which allows us to analyse the heat transfer and thermal distribution within the lamp. The results show that the temperature profile of the CMH lamp is strongly influenced by the lamp’s geometry and operating conditions. The highest temperatures are found at the centre of the arc tube, while the temperatures at the ends of the tube are lower. The temperature distribution within the CMH lamp is non-uniform, which can have implications for the lamp’s performance and lifespan. The study provides important insights into the thermal behaviour of CMH lamps and can be useful for optimizing their design and performance. By understanding the temperature distribution within the lamp, the potential areas of improvement are identified, and new parameters, such as knee point, are opined to enhance the lamp’s efficiency and lifespan.
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• ceramic metal halide lamps
• diffusion equation
• heat transfer
• thermal distribution
• knee point