I would also be interested in seeing how long it runs in firefly mode. A couple of lights I’ve tried (Sunwayman S10A, V11R with extender) only last about 36 hrs in the lowest mode.
I’d like to do a AA flashlight firefly mode shootout but don’t have any of the Thrunites that boast 200 or 400 hours. I do have a Tiara A1 Pro (v1) that ran about 20days in the second lowest mode with a Duracell (eneloop). I’m trying the UT01 now in the lowest programmable mode, but it’s still too high to really be a firefly mode. A really good low, but not quite firefly to me