  I explore a phenomenon of the circumstellar H alpha and H beta absorption
lines in the spectrum of luminous type IIL SN 2008fq taken on day 6.8 after the
discovery. The absorpion is identified with the radiatively accelerated
preshock wind up to ~800 km/s. The required initial luminosity is attributed to
the earlier circumstellar interaction with the confined dense shell of ~0.08
Msun. The modelling of similar luminous type IIL SN 1998S based on the same
approach results in the comparable shell mass of ~0.1 Msun. More than 1 dex
larger mass of the confined dense shell of both SNe IIL compared to that of
type IIP supernovae is attributed to the larger progenitor mass of type IIL
supernovae.
