  In this paper we propose a 'knee-like' approximation of the lateral
distribution of the Cherenkov light from extensive air showers in the energy
range 30-3000 TeV and study a possibility of its practical application in high
energy ground-based gamma-ray astronomy experiments (in particular, in
TAIGA-HiSCORE). The approximation has a very good accuracy for individual
showers and can be easily simplified for practical application in the HiSCORE
wide angle timing array in the condition of a limited number of triggered
stations.
