Empirical cumulative luminosity functions. Comparison of the V-band LFs in the Fornax cluster, the LG, and other nearby environments. We use the compilation of Ferrarese et al. (2016) for the LG and Virgo, the Müller et al. (2019) compilation for the Centaurus A group, the compilation of Carlsten et al. (2021) for other nearby groups, and the galaxies in this work for the Fornax cluster and the Fornax A group. The vertical dashed lines show the cutoff limits of M_V = −18 mag and M_V = −12.5 mag.