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I got a lower output version?

  • MilesDevon Tuesday, October 4, 2011 7:57 AM Reply
    Today I received this torch (FandyFire STL-V2). White letters on the torch body tell that the brightness is only 1000LM: "STL-V2 High light CREE T6 1000LM".

    The brightness is not what it is supposed to be, around 1500lm. I measured the current from the tailcap in HI mode, and it was only 1.68A! Has anybody else encountered this kind of problem? All the modes switch on properly but the driver doesn't give enough current to the emitters.

    Build quality seems very solid, the module is not a drop-in version, the head of the lamp feels heavy and solid.
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  • cyclist Moderator Tuesday, October 4, 2011 9:01 AM Reply
    It was never going to be 3000 Lumens and 1500 is really more likely anyway.
    Have you made sure the switch and pill etc... are tight and the threads are clean, it can make a bit of difference.

    What battery's are you using, some have more internal resistance than others?
    Also, what type/length are your MM leads, as long and thin will not give a proper reading.
    Flashlight issues~https://tinyurl.com/bw2d3pd
    DX Return Policy/Warranty~https://tinyurl.com/yb7dpg3s
    New customers read this ~ http://tinyurl.com/3kcyfqm
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  • Mara127 Tuesday, October 4, 2011 9:08 AM Reply
    Tailcap current on high 1.66A - 1.72A. Not good! It seems that there is lower output version! I'm bit disappointed :(
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    post edited by Mara127 on 10/4/2011 at 9:34 AM
  • MilesDevon Tuesday, October 4, 2011 1:00 PM Reply
    The batteries I'm using are brand new True 2400 mAh protected Trustfires, http://www.dealextreme.com/p/trustfire-protected-18650-3-7v-true-2400mah-rechargeable-lithium-batteries-2-pack-20392

    I am unable to take out the emitter module until i make a tool for unscrewing the retaining ring inside the lamp head. Or is there a tool available in DX? Then I'll check that the wiring and contacts are ok.

    The current was measured with a Fluke DMM with original test leads.

    Mara127, do you have the same problem, too?

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    post edited by MilesDevon on 10/4/2011 at 1:02 PM
  • davecuk Tuesday, October 4, 2011 5:40 PM Reply
    Mine was from the first batch and draw 2.6-2.7 amps from fully charged cells, it's well above 1500 lumens. It in fact outshines my friends HID headlights on his car! In the garden it's similar to a 300W halogen security light coming on. Stupidly bright.

    It does seem though that later batches have come in drawing less current. I have friends with torches bought a month after mine that draw only 2.0A on high and another who got his very recently from presumably the 3rd batch and these only draw 1.5 to 1.7A on high.

    my suspicion is that the company that makes the pill makes it for a number of manufacturers (similar type torch), some of whom have had a lot of faulty units (burnouts of regulation circuit etc..). I think the Fandyfire was heat sinked quite well and wouldn't have had a problem (mine doesn't), but, they probably suffered because the manufacturer reduced the power output to prevent the problems. My guess is that now all the batches come in with reduced power pills.....A real shame because at 2.7 amps...it's stupendously bright!

    I think send it back to DX, so they get the message....more power (less life is OK)
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  • Mara127 Tuesday, October 4, 2011 9:01 PM Reply
    MilesDevon; Yep, same problem and same construction as you described.
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  • MilesDevon Tuesday, October 4, 2011 10:30 PM Reply
    Okay people, thanks for the info! This all confirmed my suspicions about the lower output version. This latest batch actually is lower powered. But there might be a good solution for this. Someone had a totally faulty driver and then someone else suggested that he should try this driver: http://www.dealextreme.com/p/6-18v-3000ma-3-mode-circuit-board-for-xm-lt60-emitters-57779

    I am now thinking of ordering that driver also and see if it works better than the original. The only thing I concern is the correct amount of batteries. Will it work on 2x18650 on full power? Or does it need 3x18650? If so, can I buy separately an extension tube to fit three batteries in this lamp?
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    post edited by MilesDevon on 10/5/2011 at 12:44 AM
  • cyclist Moderator Wednesday, October 5, 2011 7:46 AM Reply
    That driver will be fine with two battery's.
    Flashlight issues~https://tinyurl.com/bw2d3pd
    DX Return Policy/Warranty~https://tinyurl.com/yb7dpg3s
    New customers read this ~ http://tinyurl.com/3kcyfqm
    Tracking site ~ http://www.17track.net/en
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  • matthijs777 Wednesday, October 5, 2011 3:36 PM Reply
    i ordered this driver, hope i can repair it my self, en hopes it works.
    but it will take 3 weeks before i will receive it, i think

    question: if 2 batteries are ok... are 3 better?
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  • dwt1963 Friday, October 14, 2011 4:51 PM Reply
    I also received one that states 1000LM on the side and the measured current on high is 1.7A. Light is a little brighter than my UltraFire KH-T60 HA-II XM-LT60 5-Mode 1200-Lumen White LED Flashlight (1 x 18650). Has anyone acquired about returning this light?
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