This paper introduces a new Pspice fluorescent lamp model based on the exponential function, arranged in a similar way as in the well-known equation used to describe the voltage and current relationship in a p-n semiconductor junction, sometimes referred as the Shockley equation. The new exponential model depends upon two parameters, which can be basically determined by means of two strategies. In both cases, the user has a very simple, accurate and fast numerical simulation model, mainly free of convergence errors. The paper shows how to estimate both parameters in order to build both strategies in the Pspice 9.1 student version. A comparison between the two approaches is then made, using two different lamp powers, revealing very similar results regarding the voltage and current amplitudes as well as the waveform shapes. Experimental curves are also included to serve as a reference basis.
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