  The transition between the two lowest-luminosity spectral classes of brown
dwarfs--the L dwarfs and T dwarfs--is traversed by nearly all brown dwarfs as
they cool over time. Yet distinct features of this transition, such as the
"J-band bump" and an unusually high rate of multiplicity, remain outstanding
problems, although evidence points to condensate cloud evolution as a critical
component. Using a Monte Carlo population simulation that incorporates the
empirical spectral properties of unresolved brown dwarfs in magnitude-limited
samples, I demonstrate that the J-band bump and enhanced multiplicity naturally
emerge from a short timescale of photospheric cloud dissipation. This timescale
may help constrain future evolutionary models exploring the cloud dissipation
process.
