Thanks for the review. As usual, 1Lumen is much more illuminating than what its name indicates
Anyway, I would like to report a mistake, in the part where it states,
“modern features like an Attiny1634 with 4+2 pogo pin pads”
That could be true for older lights, but it’s pretty well established the newer (2024+) FFLs like the X4 come with a new(er) version of the Lume driver, which used the AT1616 and the new 3-pin flashing pad layout – this shows even in the “driver close-up” picture included in the review itself: https://1lumen.com/wp-content/uploads/fireflylite-x4-sft25r-closeup-driver.jpg
EDIT: this other review of the X4 Stellar (with a different LED) also makes the same mistake:
