  The combined effect of a strong gravitational field and electromagnetic field
in the vicinity of a generic regular black hole related to non-linear
electrodynamics with Maxwellian weak-field limit on the radiation flux of a hot
spot orbiting the regular black hole on the Keplerian disc has been studied.
The frequency shift due to the strong gravitational field and magnification of
the radiation related to gravitational lensing have been calculated. We compare
the flux related to the Maxwellian regular black hole to the flux of the hot
spots moving with the same orbital period around standard Schwarzschild and
Raissner-Nordstrom black holes to illustrate the role of the effective geometry
governing photon motion around the regular black hole.
