Kyropules grown samples are used in a investigation of absorption, emission and electrical properties of crystalline phosphors of alkali halides, activated by negative halide ions. Zero photoconductivity, the form of half with temperature dependence, and asymmetric line shape justify the use of a configurational coordinate model. Trivial dependence of peak position on temperature, or the solvent anion, show that the electronic levels involved are associated with the activator ion.