I have the 2,900 lumen model of the Fenix TK75. Funny part (not so funny) was that about a month after I got it in the mail, they came out with the 4,000 lumen version. I love the throw and runtimes on the 2018 5,100 lumen compared to my old school TK75 with only emitting 2,900 lumens. So any how let me get to my point on this thread. Since it's almost end of November I'm assuming sometime in the next few months they may come or with a 2018 UE edition or a 2019 edition which I'm guessing maybe able to push 7,000+ lumens? Not sure as I'm no pro at this stuff. Buy the TK75 2018 edition or wait maybe a few months till the newest version comes out. Anybody have any idea of the release of a new one? If it's mid 2019 I'll end up getting the 5,100 lumen 2018 edition. Thanks for any ideas. -blglov