Top panel: log(﹩{{L}_{{\rm H}\alpha }}/{{L}_{{\rm bol}}}﹩) as a function of log(﹩{{m}_{{\rm col}}}﹩) of the chromosphere break for the ﹩{{T}_{{\rm eff}}}=2400﹩ K set of models. The colored lines show the same chromospheric filling factors as in Figure 10. The light gray shading represents the full range of observed log(﹩{{L}_{{\rm H}\alpha }}/{{L}_{{\rm bol}}}﹩) for M8 dwarfs, and the dark gray shading indicates the interquartile range. Bottom panel: filling factor as a function of log(﹩{{m}_{{\rm col}}}﹩) of the chromosphere break. Values that correspond to models that fall in the full range of observations for M8 dwarfs are indicated by small light gray circles, and values in the interquartile range are the large dark gray circles.