Finally, precise measurements were achieved in 2023 by unambiguous detection of the emitted photons (8.338(24) eV) and in April 2024 by two reports of excitation with a tunable laser at 8.355 733 (10) eV and 8.355 74 (3) eV. The light frequency (2 020 407.6 ± 2.8 GHz) is now known with sufficient accuracy to enable future construction of a prototype clock, and determine the transition's exact frequency and its stability.