Total X-ray luminosity (L_X, total, green) and X-ray luminosity of hot gas (L_X, CGM, purple) within R_500c in 0.5 − 2 keV as a function of the M_500c. The red dashed line is the best-fit single power law to our measurements of the L_X, CGM − M_500c relation. The brown data points are taken from Eckmiller et al. (2011), Lovisari et al. (2015), Mantz et al. (2016), Schellenberger & Reiprich (2017), Andreon et al. (2017), Adami et al. (2018), Bulbul et al. (2019), Lovisari et al. (2020), Liu et al. (2022), Popesso et al. (2024) (Notice the presence of selection effects and Malmquist bias in these observations). The L_X, CGM − M_500c relations predicted by simulations EAGLE, TNG100, SIMBA and FLAMINGO with 1σ uncertainties are overplotted (Braspenning et al. 2023).