Firstly, the light source performance was evaluated by
measuring the spectrum and evaluating the quality of the
spectral correction. The spectra from the Tungsten light
source setup before and after filtering were collected using
an affordable high-resolution, high-stability CCD
spectrometer (HRS-VIS-025, Mightex Corp.), and compared
to the well known solar spectrum (AM1.5 G). To assess the
spectral match between the filtered Tungsten light and the
AM1.5 G spectrum, the mean square error (MSE) for each
case was evaluated as follows: