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Thread: Review Klarus XT11GT

  1. #1
    Flashaholic Danielsan's Avatar
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    Default Review Klarus XT11GT

    For consideration in the review forum

    As some of you might know i won a Klarus XT11GT (give away) here and i want to write a little review about it. Later i realized how much features and complex UI this thing has, maybe i was a bit cheeky So im sure i will forget something, feel free to ask.

    The XT11Gt is a typical tactical 1x18650 light with the famous double tailcap switch (paddle) from Klarus and a side switch. Now you see more and more manufactureres adopting this additional paddle switch in their tactical lights. The XT11GT is very similar to the XT11S model except the emitter and the length, according to the manufacturers specs its a bit longer now. I dont own the XT11S, so i can not confirm that.








    The light comes in a standard red/black cardboard package



    This is what you get when you buy the light, a lanyard, a holster with Klarus label, a spare o-ring, the manual and a USB to micro USB cable. You also get a 3600mah 18650 battery.


    Now to the XT11GT itself, here is a 360° view of the light





    Here are some closer images of the light. The machining is pretty good, they did a very good job here. Klarus use their typical battery status indicator switch here as well, i always loved that feature, its a pitty that many other manufacturers dont use indicators like that. The light comes in black, other tactical Klarus models like the XTQ1 are in grey. I usually prefer other colors instead of black like olive, desert tan, grey etc.. but thats a matter of taste. The switch can indicate the battery status in the first seconds after you switched the light on. The status is indicated in 4 different battery status levels, more on that later.

    The head is glued in with blue loctite, i have no problem with that. However the grooves you can see on the head have minimal anodizing problems at the edges, you can see the silver aluminum trough, its barely noticable in real life though. Maybe this is because they use some kind of tool that fit in those grooves.




    As you can see the surface looks really smooth, perfect laser engravings. The tactical ring is not firmly installed, you can twist it with your fingers, im not sure if that is on purpose or not. My XTQ1 have a loose ring as well. I want to mention those things and dont give a biased review here.




    The light has a coated glass lens and matte grey stainless steel bezel, probably beadblasted.




    The additional Klarus paddle switch next to the tailcap clicky, its a forward clicky which means momentary on is possible. The paddle is a feature i love about those tactical Klarus lights. It can be pressed easily with gloves. I will write more about it later.


    Lets compare the Klarus XT11GT with other 1x 18650 tactical lights, its a rather short light despite its USB Port.



    Since i cant remove the head i had to take that picture trough the battery tube. Im not sure why the head is glued but i can imagine that it would be a pain to unscrew the tailcap if the head wasnt glued in since i need some force to unscrew the tailcap. Usually i grab the head for a firm grip and unscrew the tailcap with my other hand. This would be not ideal when the head is not glued in. My XT11GT tailcap needs some force to get it tight and every mm will count here otherwise you will get some contact problems. As i arrived in the forest at night for the outdoor beamshots i thought the light is defective but the tailcap needed an extra mm to get contact.

    The XT11GT has a spring in the head as well, its perfect for use with a bicycle (for example) since the battery has better contact compared to a flashlight with a single spring and vibrations dont influence the light that much.


    The XT11GT uses a XHP35 HI D4 emitter with a smooth reflector while the XT11S uses a XPL High emitter, it has four brightness levels and two special modes (SOS and Strobe). According to the manufacturer the light has 2000 lumens on turbo (with the right battery), 400 lumen on high, 100 on medium and 10 at the lowest mode. The mode sequence is a loop from Turbo to low. A peak beam intensity of 40401cd is plausible, i had similar results with a luxmeter.





    PWM



    The light has PWM in the lower modes and there is a little high pitched buzzing going on, of course you can only hear it in a silent environment.










    Here is a little color bin comparision, its cool white but i would say not as cool as a nitecore MH20 or Olight S30 for example.




    I had no problems with different sized batteries or flat tops cells. As you might see, the light has an inner tube. I guess this is because of the electronical paddle switch in the tail cap.
    A polarity protection is also build in.



    The charging feature of the light

    I used a 2 amp USB Adapter and a USB Power Monitor. The light charged with about 0.93amp as you can see. During charging the status indicator LED inside the side switch is red, when the charging process is finished it will turn green. If something is not right during charging you will get a blinking orange indicator light. I noticed that the status indicator turned green but the battery was still charging (with 0.7 amps). 40 minutes after the indicator went green the light stopped the charging process and the USB power monitor showed 0.0 amp. I left it still plugged in for 2 hours and in those 2 hours the power monitor showed a little 0.12 amp blip every 10 secs. I called it a day and removed the battery, it had 4.23V. I used the 3600mah Klarus battery, it was already 90% charged for that little test.





    Here are the four battery status colors you will see when you switch the light on, the indicator light is only active for several seconds after you switched the light on.
    Green indicator light = A full or nearly full battery
    orange indicator light= i measured a battery right after the orange indicator light appeared with 3.8V
    red indicator light = i measured a battery right after the red indicator kicked in with 3.5V
    blinking red indicator = i measured a battery with 3.0V

    I dont know the correct limits under load.







    To the UI:

    Now this is the complex stuff and im sure i will forget to mention something here since the light has some more features compared to other lights.
    The XT11GT offers you three different operating options/methods, those are the...




    • tactical setting
    • outdoor setting
    • advanced outdoor setting



    At default the light comes with the tactical setting, switching between those three operating modes is pretty simple and it works like a charm. When the light is off, long press the side switch for about 10 sec, a strobe mode will appear, keep pressing the side switch the whole time! While pressing the side switch you can push the paddle switch at the back to change between the 3 settings. The light will give you blink signals to indicate in which setting you are. The light flashes once for tactical setting, twice for outdoor setting and three times for the advanced tactical setting.


    tactical setting/mode:
    In tactical mode/setting all three switches work and the main difference compared to the outdoor setting is the instant strobe function when you keep the paddle switch pressed from on or off.
    The tailcap clicky will give you instant turbo everytime you press it. You can turn the light on with the side switch or like i mentioned before with the tailcap clicky (instant turbo). You can change the brightness levels with the side switch or the paddle switch (short press), the only difference is that the paddle switch gives you only 3 brightness levels while the side switch gives you 4

    The side switch is pretty similar in tactical and outdoor mode. You can lock out the light with the side switch from off when you press it longer than 5 secs and a triple click will unlock it again. You get instant low when you long press the side switch. A short press from off switches the light on in the last mode you used it (mode memory) and you can select your brightness levels with a short click as well. A double click from off or on will trigger the strobe mode, another double click SOS. A long press from on switches the light off (with mode memory), you can alternatively switch the light off with the tailcap clicky as well but you will enter turbo mode before the light can be switched off. When you switched the light on with the tailcap clicky you can not switch the light off with the side switch!

    outdoor setting/mode:

    The only difference between the tactical and outdoor setting ive noticed is that the paddle switch gives you instant low from off instead of strobe and you can select between 4 brightness levels with the paddle switch now, in tactical mode you have only 3 brightness levels on the paddle switch but of course 4 as well when you use the side switch for that, i know its a bit confusing. According to the Klarus website one benefit of the outdoor setting is mode memory but mode memory (side switch) works in tactical mode as well.


    advanced tactical setting/mode:

    In this setting the side switch is deactivated, its a very simple and reduced mode compared to the others. The tailcap clicky gives you turbo from on or off and the paddle switch will give you strobe from on or off, thats it. You cant select a brightness level in that mode.




    runtime test:


    The diagram looks a bit weird but this is because of the temperature sensor, the XT11GT monitors the temperature constantly and therefore adjusting the brightness all the time, you can see that in real life pretty good. Many other lights dont have a temperature sensor and those lights use a timed step down instead.














    indoor beamshot





    Compared to a Klarus XTQ1








    outdoor shots

    little camping white table in 51 yards








    GIF









    The XT11GT is a nice light, pretty sophisticated, the paddle switch is awesome and the overall quality is very good. Some wont like the PWM and the slightly overcharging (4.23V). Maybe only my copy does that! If Klarus can iron out those little things, especially the little overcharging it will be a hard to beat tactical light in that 1x18650 format. Feel free to ask, im sure i forgot to mention something because of all the features.


    Last edited by Danielsan; 10-09-2016 at 06:56 PM.

  2. #2

    Default Re: Review Klarus XT11GT

    Thanks for the great detailed review Daniel

  3. #3

    Default Re: Review Klarus XT11GT

    Thanks for the review! Was waiting for this one. Do you have an estimation of the actual OTF max lumens?
    What's the 2nd from left light in the 18650 lights line-up?

  4. #4
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    I can try to make a ceiling bounce test, my little styrofoam sphere isnt ready yet because i need reference lights. I will have lab tested reference lights in some weeks thanks to a special guy in germany and thanks to a great guy from a german flashlight company.

    The light is a Nitecore P25 Smilodon

  5. #5

    Default Re: Review Klarus XT11GT

    Seems like a very nice light. I just wish they would offer it in something other than CW

  6. #6

    Default Re: Review Klarus XT11GT

    Great review! I won this light as well in the giveaway. I'll add some of my test results and thoughts here as I get them.

    I did do a lumen test and got around 1200 OTF lumens on turbo with supplied battery. I will try again with some different fully charged batteries and see what I get. I'll also see what kind of battery amp draw I get with the different batteries.

    I do plan on changing out the XHP-35 HI to a neutral white, I'll get some internal pics to share.

    With a fully charged battery I got 3.2 amps at the tailcap on turbo. A 1000 lumen light usually has 3 amps, to get 2000 lumens it would probably be around 7 amps.
    Last edited by MikeB.; 10-10-2016 at 07:03 PM.

  7. #7
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    Default Re: Review Klarus XT11GT

    Thanks for the review! I've been waiting for a description of the modes.

    So, if I understand it right, in tactical mode:
    1. The tail and paddle switches behave pretty much like the XT line does now. That is, tail switch is always turbo. Paddle switch is "hold for instant strobe, from on or off", or click to change modes from on.
    2. The side switch also adds in a number of things, including hold for instant low from off, click for mode-memory last-mode used, etc.

    I'm mostly hoping you can re-confirm item #1 above.

  8. #8
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    Quote Originally Posted by MikeB. View Post
    Great review! I won this light as well in the giveaway. I'll add some of my test results and thoughts here as I get them.

    I did do a lumen test and got around 1200 OTF lumens on turbo with supplied battery. I will try again with some different fully charged batteries and see what I get. I'll also see what kind of battery amp draw I get with the different batteries.

    I do plan on changing out the XHP-35 HI to a neutral white, I'll get some internal pics to share.
    Hi Mike, that is a nice idea. The light seems to have a pretty high parasitic drain over 300µA. I also accidentaly removed the tail switch because it came loose and i tried to tighten it but i accidentaly unscrewed it, its a counterclockwise thread : )

    Quote Originally Posted by Joe Talmadge View Post
    Thanks for the review! I've been waiting for a description of the modes.

    So, if I understand it right, in tactical mode:
    1. The tail and paddle switches behave pretty much like the XT line does now. That is, tail switch is always turbo. Paddle switch is "hold for instant strobe, from on or off", or click to change modes from on.
    2. The side switch also adds in a number of things, including hold for instant low from off, click for mode-memory last-mode used, etc.

    I'm mostly hoping you can re-confirm item #1 above.
    I never owned the XT11S but that is right except the paddle switch gives you strobe from on as well when you hold it, short clicks for changing the brightness. Like i mentioned the paddle switch gives you only 3 brightness levels in tactical mode while the side switch gives you 4. Dont know why that is.

    the side switch gives you all extra features, i would even say the side switch is the main switch because you can do nearly everything with it like mode memory, shortcut for lowest mode, lock out, all brightness levels, strobe.. the only thing the side switch cant do is instant turbo, you have the tail clicky for that.

  9. #9
    Flashaholic arKmm's Avatar
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    Default Re: Review Klarus XT11GT

    In some bits of your review you referred to the third mode as 'advanced outdoor' and in others 'advanced tactical'. I think it's called 'tactical assault' or something like that?

  10. #10
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    Quote Originally Posted by arKmm View Post
    In some bits of your review you referred to the third mode as 'advanced outdoor' and in others 'advanced tactical'. I think it's called 'tactical assault' or something like that?
    correct, i made a little concentration error here because it was actually very late at night or early morning advanced tactical setting is correct. Thank you!

  11. #11
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    Default Re: Review Klarus XT11GT

    Thanks Daniel, still waiting for mine. So if I'm using the side switch, how long does it have to be off to retain the memory? If I turn it off, then need it back on in 1 or 2 seconds, will it advance through the cycle? Thanks, Matt.

  12. #12

    Default Re: Review Klarus XT11GT

    Great review ! I have one as well and I have to say I'm not happy. It's not even close to 2000l. I have a 1000l tk16 and it is barely out performed by the klarus
    Last edited by gsteve; 10-10-2016 at 05:15 PM.

  13. #13

    Default Re: Review Klarus XT11GT

    standby drain of 300μA? deal breaker for me...

  14. #14

    Default Re: Review Klarus XT11GT

    Quote Originally Posted by gsteve View Post
    Great review ! I have one as well and I have to say I'm not happy. It's not even close to 2000l. I have a 1000l tk16 and it is barely out performed by the klarus
    I got around 1200 lumens when comparing lights in my small sphere.

  15. #15
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    Quote Originally Posted by matt4350 View Post
    Thanks Daniel, still waiting for mine. So if I'm using the side switch, how long does it have to be off to retain the memory? If I turn it off, then need it back on in 1 or 2 seconds, will it advance through the cycle? Thanks, Matt.
    No, it wont advance trough the cycle, you can do it as fast as you can. Its like instant mode memory

    Another thing i forgot to mention in my review is that only turbo mode is temperature controlled.

    yes the parasitic drain is over 300, its because of the more complex two switch design with the added electronical switch paddle and the inner tube. Normally you dont have parasitic drain with a tailcap clicky but nkt in this case with the always working paddle switch from off.
    Last edited by Danielsan; 10-10-2016 at 07:40 PM.

  16. #16
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    Default Re: Review Klarus XT11GT

    Thanks mate!

  17. #17

    Default Re: Review Klarus XT11GT

    Thanks for the review! Looks like a nice little light. Thinking about picking one up myself.

  18. #18
    Flashaholic* stephenk's Avatar
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    Default Re: Review Klarus XT11GT

    Great review, thanks for your time taken in doing the review.
    Given the output, I think I'll stick to using a Convoy C8 for throw.

  19. #19

    Thumbs up Re: Review Klarus XT11GT

    Great review this is a nice little light, might get one soon.

  20. #20

    Default Re: Review Klarus XT11GT

    I've had this light for a couple of weeks now. I was initially impressed, but now am very dissapointed. This has turned out to be one of my most unreliable lights I have owned. It turns off, seemingly at random.I need to take it apart by removing the battery, and 18650 tube and then put it back together then it mysteriously works again. After a little bit of use, it craps out again.I haven't dropped it or abused it. Any one else having this issue?

  21. #21
    Flashaholic LeafSamurai's Avatar
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    Default Re: Review Klarus XT11GT

    Quote Originally Posted by Chozzehnwahn View Post
    I've had this light for a couple of weeks now. I was initially impressed, but now am very dissapointed. This has turned out to be one of my most unreliable lights I have owned. It turns off, seemingly at random.I need to take it apart by removing the battery, and 18650 tube and then put it back together then it mysteriously works again. After a little bit of use, it craps out again.I haven't dropped it or abused it. Any one else having this issue?
    Have you tried cleaning the contact points? Might be a dirty contact issue.

  22. #22
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    I only have contact problems with the tailcap, it needs to be very tight. Maybe you should check that and also try to tighten the clicky from inside with a tweezer or something like that and check if its loose.
    Quote Originally Posted by Chozzehnwahn View Post
    I've had this light for a couple of weeks now. I was initially impressed, but now am very dissapointed. This has turned out to be one of my most unreliable lights I have owned. It turns off, seemingly at random.I need to take it apart by removing the battery, and 18650 tube and then put it back together then it mysteriously works again. After a little bit of use, it craps out again.I haven't dropped it or abused it. Any one else having this issue?

  23. #23
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    I tested the XT11GT with 40k lux @1m (Klarus 18650), with the LG hg2 18650 it was 50k lux @1m.

    Edit: This was not true, it turned out that my tailcap has a problem.
    Last edited by Danielsan; 10-29-2016 at 03:29 AM.

  24. #24

    Default Re: Review Klarus XT11GT

    Just tried mine with 30qs and also LG HG2s and i saw no perceptible difference.

  25. #25
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    Quote Originally Posted by res1cue View Post
    Just tried mine with 30qs and also LG HG2s and i saw no perceptible difference.
    correct! They are actually the same. I discovered that my light or the tailcap must have a problem. I tested it later and i only got 27K Lux with the Klarus battery and 40K Lux with the LG HG2 and i couldnt believe it. I tested it five times and used different protected batteries as well but i always get 27K Lux and the LG HG2 was 40K with my new Luxmeter. I couldnt explain that behaviour until i removed the tactical ring from the light, then i measured 40K lux with the protected Klarus batteries as well with my new luxmeter. I never had such a problem before. I cleaned everything and tightened the internal ring of the tailcap but still the same.
    Last edited by Danielsan; 10-29-2016 at 03:40 AM.

  26. #26

    Default Re: Review Klarus XT11GT

    Quote Originally Posted by Danielsan View Post
    correct! They are actually the same. I discovered that my light or the tailcap must have a problem. I tested it later and i only got 27K Lux with the Klarus battery and 40K Lux with the LG HG2 and i couldnt believe it. I tested it five times and used different protected batteries as well but i always get 27K Lux and the LG HG2 was 40K with my new Luxmeter. I couldnt explain that behaviour until i removed the tactical ring from the light, then i measured 40K lux with the protected Klarus batteries as well with my new luxmeter. I never had such a problem before. I cleaned everything and tightened the internal ring of the tailcap but still the same.
    Would like to know how you gonna fix the issue or if your dealer will replace it. Hope mine won't have this issue when they arrive. (crossed fingers)

  27. #27
    Flashaholic Danielsan's Avatar
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    Default Re: Review Klarus XT11GT

    Quote Originally Posted by LOUSYGREATWALLGM View Post
    Would like to know how you gonna fix the issue or if your dealer will replace it. Hope mine won't have this issue when they arrive. (crossed fingers)
    I guess never because i won the light in a give away. My sample had tailcap problems ever since. I think my tailcap has some issues, i realized it the first time i the forest at night for the beamshots, i thought the light was defective because it wont turn on until i realized that i had to tighten the tailcap really super strong. That was the first sign that something is not right with the light or tailcap. Now i discovered that the light only reach its full lux without the tactical ring installed or with shorter unprotected cells. I dont know why longer cells result in contact problems when the tactical ring is installed.
    I wouldnt worry to much about it, i heard from other xt11gt owners that they dont have that problem.

  28. #28

    Default Re: Review Klarus XT11GT

    I believe my issue is with the tail cap as well. Whenever my light craps out, I have to remove tail cap and reinstall then it works again like magic. I have it tightened ultra tight now, has been good for a couple days now. The clicky was not loose on mine, I used a pair of snap ring pliers to tighten, but would not budge any more. Hopefully having the tailcap ultra tight, I will have no more issues. I'm glad this light has USB charging, because removing the tail cap is very hard when it's ultra tight.

  29. #29

    Default Re: Review Klarus XT11GT

    Well looks like I spoke to soon. The light crapped out on me today again, this time for good. It won't turn back on no matter what I do. Oh, well, I really wanted to like this light as it was very impressive when it was working properly. I have not had very good luck with Chinese lights this year, I may have to call it quits for a while. Or maybe I'll get a dobermann with xhp35-hi, since my armyteks have been rock solid reliable thus far

  30. #30

    Default Re: Review Klarus XT11GT

    Would be nice to see this in the Review forum.

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