I don’t have the Wuben L50 but I do have some other lights from them and what I can tell you is that they are well built, they are normally very efficient flashlights and without major issues.
I had the Wuben E10 that uses an Osram P9 Led. The Led has a more or less cool white tint, has some thorw (under a Smooth reflector), and seems to be an efficient LED too. Here’s the review in case you wanna check it: “REVIEW”: Wuben E10 – Osram P9 - 1200 Lumens [Beamshots - post #15] (Pic Heavy)
On the BEAMSHOTS part you’ll find some information, and also here .
The only thing that may be or not so good is the UI, as normally they have memory for the last used mode. I am not sure if the SOS is in the main cycle. If not, that will be a nice flashlight you get 