TS25 can be very bright for a short period of time (can output over 4000lm at start up, but dims to under 1000lm in 30s), but is not very good at producing high sustainable output. Here is the quote stating just that from the TS25 review by www.stephenknightphotography.com “This sustained brightness is pretty mediocre compared to the light’s peers. For example Wurkkos’s own FC11 LH351D can sustain 300-350lm, the Emisar D4K 519A Boost, Convoy S21E 519A, and Acebeam E70 Mini 519A can sustain 500-600lm.” So if you are looking for a light that can produce high sustainable output, TS25 is not for you.
However, TS25 Nichia version has very good tint and will last a very long time for lower output levels because of larger battery capacity (5000mAh for included cell). I have tried Samsung LH351D 5000K high CRI but it was no match for Nichia 519A especially because of reds (R9). See how skin color is rendered differently for the two leds here.