An investigation has been made of the photoluminescence (PL), heat-induced luminescence (HIL) and chemiluminescence (CL) of petroleum luminophors. The luminophors were produced from high-boiling petroleum products by removing asphaltene-resinous substances. On the basis of data obtained in an investigation of heat-induced luminescence in a wide temperature range (77-300 K), a conclusion has been drawn concerning the accumulation of solar energy. The dependence of the efficiency of accumulation on the hydrocarbon composition of the luminophors, oil the presence of oxygen and on the spectral composition of the exciting light has been established. It is shown that the spectral composition of HIL and CL coincides with the PL spectrum. The correlation between non-isothermal relaxation of the EPR spectrum and the intensity of HIL in the range 210-420 K is demonstrated. It is suggested that the stable methylperinaphthene radical generated by thermal action takes part in accumulation.