The current generation of ground-based imaging atmospheric Cherenkov telescopes (IACTs) operate in the very-high-energy (VHE) domain from ~100 GeV to TeV. They use electronic digital trigger systems discern light flashes emitted by extensive air showers (EASs), overwhelming night sky (LoNS) background. Near telescope energy threshold, number photons gamma-ray-induced EASs is comparable fluctuat...