The EDCL-2T gets too warm for me. 5 amp draw on a pair of regular batteries did not set well with me. SureFire says its safe, but I am reminded that once upon a time Ford said BroncoII's don't easily roll over too. Samsung said their phones don't explode and Toyota said their throttles don't get stuck.
But I tell ya what, that sucker throws a beam a country mile. Easily ID stuff 2 football fields away. I used a 16650 in it that throttled it way back but still allowed a bunch of light out front, but the low was nowhere near as useable. I'd guess 600-700 lumens on the rechargeable. Not bad at all compared to the backup lights of before, yet you lose that whole "yee hah" feeling of the full output.