Cavity power per galaxy cluster as a function of redshift. The blue data points indicate the three radio-lobe systems detected in our sample, and the black data points indicate the cavity power estimates published by Rafferty et al. (2006), Hlavacek-Larrondo et al. (2012), Hlavacek-Larrondo et al. (2015), and Timmerman et al. (2022). Cavity/radio lobe systems that were indicated as “low significance” are indicated with open data points, whereas reliable detections are indicated with solid data points. The green bars show the average cavity power within each redshift bin, indicated by the width of each bar. The light red region indicates the approximate region that is not accessible by six arcsecond observations, such as those taken with only the Dutch part of LOFAR. The darker red region indicates the approximate region, which is not accessible by 0.3 arcsec observations, such at those taken with the complete ILT.