Cumulative FFDs (scatter) in ED, and respective power law fits to the portion of the FFDs where we considered our sample not be affected by reduced detection efficiency of low energy flares (black lines), in log-log representation. In each of the panels a-g the distributions of flares are shown for different open clusters for samples of stars in the T_eff bin that is given in the panel title. The different clusters are the Pleiades (maroon crosses), the Hyades (orange stars), Praesepe (yellow diamonds), Ruprecht 147 (green “m”s), and M 67 (blue triangles). The extension of the black lines in ED indicates the low energy threshold adopted for every fit. When no distribution is shown, either no flares were found in the subsample, or no stars in that T_eff bin were observed by K2. The overview of all power law fit parameters including uncertainties is given in Table 3.