I was surprised to learn that the E2DL is not so capable under water. I must have missed the story when it was posted.Did alot of checking prior to posting this thread, and the personal opinion I've come to is the LX2 is actually more water-resistant than the E2DL.
That have been documented threads on E2DL tailcap letting in water. So far, nothing of that sort for the LX2.
For the LX2 I don't intend to bring the light more than 5m, even for my "torture tests". Cause if it fails my warranty isn't going to hold up and there goes $300 down the dustbin.
What makes me (unexplainably) attracted to the LX2 is the UI. Press for 15 lumens and press harder for 200 lumens sounds delicious
That said, the RA 170T which I'm intending to buy is rated to 20m waterproof, is bombproof (I have gone through every inch of henry's website and am convinced). I can also customise it with the sapphire lens, titanium bezel, basically the best of everything which I will probably do. But the UI of the RA, although I don't want to call judgement before I use it, I think I'd prefer the LX2.
And now for the final deciding factor - the RA 170T takes 17670s but the Surefire can only take RCR123s. Terrible runtime.
I might actually buy both, and carry both around as EDCs.
My search for the perfect torch will never end
I think with the tail cap of the LX2 tightened there shouldn't be any problem with water ingress, especially if it is only 5 meters but don't quote me for it. I didn't say this based on experience. It is in the lockout mode that the tail cap really felt wobbly.
Not too sure if Surefire would be willing to service the LX2 should there be any issues with water ingress but they might. But do take note that SF now refuses to deal direct with us out of the US. We would need to send the light to the only authorized dealer which is Sheares Marketing.
The LX2 UI is indeed nice. In my trekking trips I usually uses only the low mode and if I need to spot something far I just depress the tail cap for high power. Simple and easy to use. One handed operation is possible but slow if you need to tighten the tail cap to on.
If you need something more powerful then LX2 is the one, do note that LX2 is only slightly more powerful in the hotspot with lesser but still usable spill light. If you need something smaller then get the 170T HDS clicky. Both lights are very tough and I love them all.