Simulated white dwarf luminosity functions computed using our reference model (open circles) compared to those obtained using the cooling sequences of Fontaine et al. (2011; top panels, open triangles) and Salaris et al. (2010; bottom panels, also open triangles). Also shown are the observational white dwarf luminosity function (solid squares) of Harris et al. (2006; left panels) and Rowell & Hambly (2011; right panels). The synthetic white dwarf luminosity functions have been normalized to the observational point with minimum error bars.