The blue distribution represents a two-dimensional histogram of the traditional equipartition magnetic field strength, B_eq (Equation (15)), compared to the measured (mass-weighted) average magnetic field strength, B_avg. The distribution includes each pixel in projected maps across all R8 model snapshots. The best-fit power law to this distribution is included as a purple line with ﹩{B}_{{\rm{eq}}}\propto {B}_{{\rm{avg}}}^{0.36}﹩. The black, dashed line represents B_eq = B_avg. The red points represent the values of B_eq and B_avg averaged over each kiloparsec-scale simulation snapshot individually. While the large-scale snapshot-averaged value of B_eq estimates the large-scale average of B_avg well, the pixel-by-pixel comparison shows that B_eq fails to recover the true B_avg at smaller scales.