  Neutrino and dark matter experiments with large-volume ($\gtrsim 1$ ton)
detectors can provide excellent sensitivity to signals induced by energetic
light dark matter coming from the present universe. Taking boosted dark matter
as a concrete example of energetic light dark matter, we scrutinize two
representative search channels, electron scattering and proton scattering
including deep inelastic scattering processes, in the context of elastic and
inelastic boosted dark matter, in a completely detector-independent manner. In
this work, a dark gauge boson is adopted as the particle to mediate the
interactions between the Standard Model particles and boosted dark matter. We
find that the signal sensitivity of the two channels highly depends on the
(mass-)parameter region to probe, so search strategies and channels should be
designed sensibly especially at the earlier stage of experiments. In
particular, the contribution from the boosted-dark-matter-initiated deep
inelastic scattering can be subleading (important) compared to the
quasi-elastic proton scattering, if the mass of the mediator is below (above)
$\mathcal{O}$(GeV). We demonstrate how to practically perform searches and
relevant analyses, employing example detectors such as DarkSide-20k, DUNE,
Hyper-Kamiokande, and DeepCore, with their respective detector specifications
taken into consideration. For other potential detectors we provide a summary
table, collecting relevant information, from which similar studies can be
fulfilled readily.
