  Type II WLFs have weak Balmer line emission and no Balmer jump. We carried
out a set of radiative hydrodynamic simulations to understand how the hydrogen
radiative losses vary with the electron beam parameters and more specifically
with the low energy cutoff. Our results have revealed that for low energy
beams, the excess flare Lyman emission diminishes with increasing low energy
cutoff as the energy deposited into the top chromosphere is low compared to the
energy deposited into the deeper layers. Some Balmer excess emission is always
present and is driven primarily by direct heating from the beam with a minor
contribution from Lyman continuum backwarming. The absence of Lyman excess
emission in electron beam models with high low energy cutoff is a prominent
spectral signature of type II WLFs.
