A spectroscopic analysis of light emitted in the 200-600 nm wavelength range by Kr⁷⁺, Kr⁶⁺ and Kr⁵⁺ ions following 120-keV Kr⁸⁺ – Li collisions is performed. Transitions with Δn = 0, 1 and 2 in Kr VIII from n = 6-11 states produced by single electron capture are identified using either ab initio energy level calculations, potential model calculations or atomic energy level data. The production cross sections for single electron capture into the nl sublevels (n = 8 and 9) are deduced from emission cross sections and are discussed by comparisons with the results obtained from three-body classical trajectory Monte-Carlo calculations in the 1.43-15 keV/amu energy range. Lines in Kr VII and Kr VI are identified respectively as Rydberg transitions 4snl-4sn'l' (n = 7, 8, 9) and 4s²nl-4s²n'l' (n = 7,8).