my gen 16800 came with tritium lume and when it was new it thought it was very bright and it lasted the night at the same level - no need to charge
fast forward nearly 23 years and it is no longer very bright but i am not going to relume as it dial / hands are still perfect (lume dots and all) and I do not want a non gen watch face.
last overhaul my guy was telling me he could get new tritium put on for about $100 which I may take him up on it at some future date