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Thread: 4Sevens Quark QTA - Initial Impressions

  1. #21
    Supporting Business NH Shooter's Avatar
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    Sep 2014
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    Quote Originally Posted by BrianB View Post
    General rule of thumb is, when all other things are equal, a light must be twice as bright to be "noticeably" brighter, and four times brighter to appear twice as bright to the human eye.

    Awesome review NH Shooter! Thanks
    Thank you, and my pleasure.

    I've made a modification to the "finger loop lanyard." I was concerned that if someone got hold of the light with the lanyard around my finger, they would be able to put a serious hurting on me (or at least that finger), so I replaced the Lanyard Closure Arrowhead piece with a Lanyard Break-away Connector. The connector is still strong enough to work as intended but will open if someone tries to use the light to gain leverage on me. I'll post a photo of the revised lanyard this weekend.

    Risking going way too far into flashlight geek mode, I have some parts on order to build another QTA "lego style." It will use the Tactical Quark Turbo head (800 lumens max) in combination with a single high current AW 14500 LiMn battery. If you look at post #13 in this thread, you will see a run time/output chart for this configuration; 750 lumens to start, tapering down to 420 lumens after 2 minutes and holding that output for another 22 minutes before depleting the battery. That's some serious light in a small package.

    Here is the list of parts needed to build this pocket-sized blaster;

    http://www.foursevens.com/products/UQB3

    http://www.foursevens.com/products/UQA7

    http://www.foursevens.com/products/UQC2

    http://www.lighthound.com/AW-IMR-145...ry_p_3644.html

    Of course, a charger is needed for the LiMN battery as well.

  2. #22
    So what is the benefit of higher lumens? If it was a thrower I could understand. But as a flood I don't understand the benefit.

    Quote Originally Posted by NH Shooter View Post
    Thank you, and my pleasure.

    I've made a modification to the "finger loop lanyard." I was concerned that if someone got hold of the light with the lanyard around my finger, they would be able to put a serious hurting on me (or at least that finger), so I replaced the Lanyard Closure Arrowhead piece with a Lanyard Break-away Connector. The connector is still strong enough to work as intended but will open if someone tries to use the light to gain leverage on me. I'll post a photo of the revised lanyard this weekend.

    Risking going way too far into flashlight geek mode, I have some parts on order to build another QTA "lego style." It will use the Tactical Quark Turbo head (800 lumens max) in combination with a single high current AW 14500 LiMn battery. If you look at post #13 in this thread, you will see a run time/output chart for this configuration; 750 lumens to start, tapering down to 420 lumens after 2 minutes and holding that output for another 22 minutes before depleting the battery. That's some serious light in a small package.

    Here is the list of parts needed to build this pocket-sized blaster;

    http://www.foursevens.com/products/UQB3

    http://www.foursevens.com/products/UQA7

    http://www.foursevens.com/products/UQC2

    http://www.lighthound.com/AW-IMR-145...ry_p_3644.html

    Of course, a charger is needed for the LiMN battery as well.

  3. #23
    Supporting Business NH Shooter's Avatar
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    Quote Originally Posted by BrianB View Post
    So what is the benefit of higher lumens? If it was a thrower I could understand. But as a flood I don't understand the benefit.
    For any given beam pattern, the higher the lumens the brighter the beam (obviously) and the longer the reach/throw.

    Also, the turbo head described in my previous post that I'm using on the next "build" uses the Cree XM-L2 emitter, which is larger and has a higher current/lumen capability vs. the Cree XP-G2 in the head of my current QTA.

    BTW, for some excellent reviews of lights, beam patterns, etc., I can recommend the http://flashlightguide.com website as an excellent resource.

  4. #24
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    Sep 2012
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    SWF
    I thought about going AA for EDC? I have a fenix LD 22 that's takes lithium, alkaline , AA.

    Ive had the light for 2 years now and haven't had any problems UNTIL last week.

    A AA Dura Cell Copper Top started leaking by the tail cap. And the light wouldn't work. After cleaning the tail cap out it worked for a short time then stop. I did more cleaning and couldn't get it to work. Fenix / Casey is sending me free switch/tailcap.

    I was lucky because I check my AA batts everyday because I knew AA have that problem. I couldn't imagine if I left it for a couple days.

    Made me rethink using AA for a EDC/ SD light.

    BTW
    I've been using 123 batts for decades now and haven't had one leak yet.

    I have no problems carrying 2- Surefire P2x fury . Cargo shorts makes it simple for me..

  5. #25
    Here is a pretty cool feature from Streamlights website. It describes the three beams they have then shows what you would see with those beams in a variety of scenarios.

    http://beamdemo.com/situations.html

  6. #26
    I picked up one of these after this great review. I really wasn't that impressed at first but this light is growing on me. My EDC is the LED Lenser P3 AFS P or the Surefire LX2 depending on the occasion so I was hoping this would bridge that gap.

    On a standard AA, I can't really tell a difference between this and the AAA 70 lumen Lenser (when they both have new batteries). Momentary burst would make this light a home run but overall I like the design, size, and 4-7s mode switch-ology. I'm going to get a spare L2 body since 14505s are harder to come by than 123As.
    Bob Loblaw lobs law bombs

  7. #27
    Supporting Business NH Shooter's Avatar
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    New Hampshire, U.S.A.
    Rich, I too have had my share of leaking alkaline batteries and no longer use them in my lights. For a 1.5 volt AA, I generally use lithium batteries or until recently, NiMH rechargeable batteries.

    Bobbj22, the jump to a 3 volt 14505 battery is pretty dramatic in this light. For an EDC light that gets regular use, I think 14500 Li-ion rechargeable batteries makes a lot of sense.

  8. #28
    SN,

    I still run/plan-to-run a 2-cell at work; but am looking for something smaller for running and the like. When it's time to replace the VTAC, I'll take a gander on the Quark 2-cell, based on how the 1-cell shakes out.

  9. #29
    Quote Originally Posted by NH Shooter View Post
    Bobbj22, the jump to a 3 volt 14505 battery is pretty dramatic in this light. For an EDC light that gets regular use, I think 14500 Li-ion rechargeable batteries makes a lot of sense.
    You were right. Those 14505s make this an entirely different light. Bought 14500s too. This combo is awesome.
    Bob Loblaw lobs law bombs

  10. #30
    Site Supporter Irelander's Avatar
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    Apr 2014
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    Venango County, PA
    Thanks for the cool review and details about building your own "Quark Special". I too am a Quark fan. I've been faithfully carrying the older version of the QTL for over 5 years. Its a great light that I have never went a day without using since I got it. I have mine set to max lumens (~210 lumens) with tail tight and "moonlight" mode with tail loosened. "Moonlight" mode is great when navigating the house without waking the kids or making the nosy neighbors nervous.

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