Spectral hole burning at low temperatures was used to study bacteriochlorophylls (BChl) e and d in natural chlorosomal structures as well as in artificially prepared monomeric and aggregated forms. Low-temperature (4.2 K) absorption and luminescence spectra were analysed to estimate spectral positions of different BChls' aggregated states. Excited state lifetimes for monomeric ( 30 ns) and chlorosomal ( 1-2 ps) BChl's were obtained from zero-phonon hole analysis. Huang-Rhys factor reflecting electron-phonon coupling was estimated for monomeric (S 1), lower-state aggregated (S vary from S 0.7 to S 3 depending on spectral position) and oligomeric (chlorosomal) state (S 5) BChl e.