The excitation and fluorescence spectra of LaOX-Pr^3^+(X=Cl, Br) phosphors were measured at room and liquid nitrogen temperatures. The characteristics of the spectra were interpreted and most of the observed f-f transitions were assigned based on the theoretical energy levels of Pr^3^+ calculated by the Double Sphere Coordination Point Charge Field model. The agreement between the calculated and the observed transition wavelengths is generally good.

Key words: ANALYTIC, LIGAND FIELD THEORY, FLUORESCENCE CHARACTERISTIC, PHOSPHOR, RARE EARTH, EMISSION, ENERGY LEVELS, RELAXATION, EXCITATION SPECTRUM, EMISSION SPECTRA