Comparison of the gr-band absolute magnitudes at maximum light between globular clusters Miras (open magenta circles) and extragalactic Miras (in various symbols). For extragalactic Miras, literature μ (see text for details) were adopted to convert m _X to M ^X _m (after corrected for extinction). The left and right panels are for the comparisons of O-rich Miras and C-rich Miras, respectively. The lines are same as in Figure 6, but extrapolated to a longer period.