Ah yes. I saw another one like that one that had the full-diameter lens instead of a small orifice. At any rate, I’m glad you like it. They’re coming out with some great deals recently.
It turned out brighter than I expected. It looks to be a typical Nichia beam, probably a K1.
15 lumens from a single 5mm LED would have stunned me, the ten I got, dropping to about 9.5 after 2 minutes was much more than I expected. That makes it 50% brighter than a Fenix E01 and more than 2.5 times as bright as an E0. That was with NiMH. With my last two AAA alkalines that are needed for something else, it read 61 lux initial brightness, or 11 lumens which puts it in the same area as the AA Powerlight that is one of Mr. Admin's favourites and is the home of my "dead" alkaline cells to finish them off entirely before recycling.