P.S. Which one would you prefer, Jetbeam III M or Olight M20 Warrior Premium?
Hmm, I actually have both these lights.
To be honest I like them both, I got the M20 Premium which has the R2 LED with a little more output - this is my strongest thrower. I got the warm tint Jetbeam, this is my most visually pleasing output light. The M20 has 4 modes accessed by tightening & loosening the head to change between them, it remembers the last mode and always starts on that. The Jetbeam only has 2 modes - full power when you tighten the head and custom setting when you loosen the head - but the custom setting can be anything you want, so advantage to Jetbeam on the UI in my opinion. I really think the ability to set the custom mode on the Jetbeam to anything you like is a hard feature to beat - you can set a lower low setting than the Olight offers or a useful medium setting, strobe, SOS or whatever - you then have your personal custom setting or full power, no other rubbish to cycle through.
The build quality may be better on the Jetbeam, but both are excellent so no biggie. I did remove the cigar grip & clip from the M20 because I found them really uncomfortable, but with them gone the torch feels good in my hand. The Jetbeam came with a really good 2 way clip which is a nice feature.
I like both and think most people would be happy with either. If I were forced to only keep one then I would probably go with the Jetbeam.
If you are going to use 2 x 16340 or 2 x CR123 cells in the Jetbeam then you can stop them rattling by buying a spare Olight battery tube or 2 I use these with either light.