Properties of the visible XeF (C→A) photolytically pumped laser system have been investigated in detail. The research covers four main areas: (1) absolute fluorescence intensities from theCandBstates, (2)C→Afluorescence spectra as a function of pressure and buffer gas, (3) gain/absorption measurements from 400–650 nm, and (4) demonstration of tunable laser operation over the 454–525‐nm range. All results reported here indicate that the XeF (C→A) laser could be a highly efficient visible laser system.