Luminosity functions for clusters in each age group. These functions have been normalised such that the area under the curve equals one. We include all members within 3 tidal radii. The solid black lines show the benchmark cluster, and shaded areas represent the Poissonian uncertainty. We sort the clusters by their distance to more easily trace the completeness limit (denoted by vertical lines). The y-axes show the p-value from the Kolmogorov–Smirnov comparison, with the benchmark cluster within the common completeness limits.