Had me between a LED Lenser (P 14) and the Fenix LD 41 decide.
Major benefits for me were:
+ Waterproof to IPX8, very robust
+ 4 light modes (and 2 Special modes and momentary)
+ Mode memory, you do not have to come across a brighter lamp circuit into a lower level
+ Without focus, spot / spill together, the fumbling at the focus distracts and is annoying
Regulated +
+ Battery operation possible and allowed
+ Design
Addendum:
+ Does not roll away
small drawbacks:
- Tailstand possible, but not 100% well as main switch protrudes slightly
- Handle the winter cold as metal
- No "lightweight"
- Main switch bit stiff
CONCLUSION: 4.5 stars. The light color is already cool white, but bluish under any circumstances, as I feared. In turbo mode with 520 lm the LD is probably one of the top lamps 41 currently, the AA refer your power from 4 x 1.5V.