The kw cslpm1.tg gives a very small hotspot. It will shine very far but in my c8 with this led i found the hotspot to small for search and rescue. The ft03 astrolux with sst40 works perfectly for me.
Definetely Astrolux FT03 SST40 and using Shockli 26650 5500mah 30A. It can sustain long run with less heat. I heard the xhp50.2 version will generate heat faster than the sst40 on turbo, thus cut the runtime.
More plus, FT03 operating in Narsilm which give ramping mode by simply click hold, easy single click on/off.
@xcentric, if you are interested, I would like to offer you a brand new Astrolux FT03 SST40-W 2400lm neutral white 5000K, for 35$ including shipping via DHL (without tracking) to UK. Then you do not have to wait so long in case of an order from BG. If you’re interested, write me a PM. The FT03 can be used with 18650, 21700 or 26650 batteries.