EN
Single crystals of mixed sillenites Bi_{12}Ti_{1-x}Pb_{x}O_{20} were grown using the top seeded solution growth method. The pulse illumination was used to study the phototransport properties of these crystals. It was evidenced that the illumination changed the photoconducting properties by 4-5 orders of magnitude comparing with previously studied Bi_{12}MeO_{20}, where Me = Ge, Si, Ti. The performed experiments indicate on the photogeneration of metallic grains in the insulating matrix of Bi_{12}Ti_{1-x}Pb_{x}O_{20}. Correlations between photochromism and photoconductivity was established.