In this paper we report the results of VUV studies on SrS:Ce,Y thin films performed at the Superlumi station of Hasylab, Hamburg, Germany. We present photoluminescence spectra, excitation spectra and luminescence time profiles of SrS:Ce, Y thin films under UV and VUV pulsed synchrotron excitation at liquid helium temperatures. The photoluminescence spectra are compared to radioluminescence spectra obtained under 42 kV X-ray excitation at room and liquid He temperatures. Finally we report also preliminary results of the low temperature thermoluminescence (ltTL) measurements. All these experiments are discussed in terms of a model involving two centers, an octahedrally coordinated Ce3+ ion and a lower symmetry Y3+-VSr 2- complex, playing a role of luminescent centers, traps and recombination centers. The implications of the model for a device operation are also discussed shortly.