Szczepan Bia³ek wrote:
I do not know what are movements of elecrtons in conductor but in air
(lightning) they oscillate with RF frequences and that movement is not
close to infinitesimally small (kilometers).

Unfortunately, the discussion is not about lightning
but is instead about the "movements of electrons" in
an antenna "conductor" about which you "do not know".

Incidentally, the electrons energized by lightning do
indeed emit broad spectrum photons, i.e. EM waves.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com