Maybe try the Oslon Square LED:
4000K color temperature <— warmer than the 5000K Nichia 219B or 4500K 219A, but not orange like the 3000K high-CRI CREE LEDs.
92 CRI <— same CRI as the Nichia 219
From the review in that thread, it significantly outperforms the Nichia 219B at higher current. It also has a very low forward voltage requirement so should run longer as the battery depletes.