Comparison of BPASS models to the observed WR bumps. The panels show the blue (a, c) and orange (b, d) WR bumps in the Sunburst LCE, this time shown in normalized f_λ units. Shown here along with the observed data is a selection of the fiducial BPASS (Eldridge et al. 2017; Stanway & Eldridge 2018; Stevance et al. 2020) synthetic spectra corresponding to a metallicity of 19% Z_⊙ as found using the direct method, and the range of ages at which a considerable WR population can be present. Binary evolution is enabled in the models in panels a and b, and disabled in panels c and d.