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  1. #1
    Flashaholic* chevrofreak's Avatar
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    Default Fenix L2D CE and L1D CE runtime graphs

    Fenix L2D CE - max - Energizer E2 lithium: 1608 (est 114.86 lumens)
    Fenix L2D CE - max - Kirkland alkaline: 1591 (est 113.64 lumens)
    Fenix L2D CE - max - Duracell 2650mAh Ni-MH: 1561 (est 111.5 lumens)



    Fenix L2D CE - high - Kirkland alkaline: 906 (est 64.71 lumens)
    Fenix L2D CE - high - Energizer E2 lithium: 899 (est 64.21 lumens)
    Fenix L2D CE - high - Duracell 2650mAh Ni-MH: 888 (est 63.43 lumens)



    Fenix L2D CE - medium - Energizer E2 lithium: 600 (est 42.86 lumens) (dropping to 432 (est 30.86 lumens) in 20 seconds)
    Fenix L2D CE - medium - Kirkland alkaline: 431 (est 30.79 lumens)
    Fenix L2D CE - medium - Duracell 2650mAh Ni-MH: 428 (est 30.43 lumens)



    Fenix L2D CE - low - Energizer E2 lithium: 687 (est 49.07 lumens) (regulation kicks in at 1 day 1 hour 33 minutes: 89 (est 6.36 lumens)
    Fenix L2D CE - low - Kirkland alkaline: 167 (est 11.93 lumens) (regulation kicks in at 46 minutes: 89 (est 6.36 lumens)
    Fenix L2D CE - low - Duracell 2650mAh Ni-MH: 90 (est 6.43 lumens)



    L1D CE is done

    Fenix L1D CE - max - Energizer E2 lithium: 1104 (est 78.86 lumens)
    Fenix L1D CE - max - Kirkland alkaline: 989 (est 70.64 lumens)
    Fenix L1D CE - max - Duracell 2650mAh Ni-MH: 979 (est 69.93 lumens)



    Fenix L1D CE - high - Energizer E2 lithium: 875 (est 62.5 lumens)
    Fenix L1D CE - high - Kirkland alkaline: 866 (est 61.86 lumens)
    Fenix L1D CE - high - Duracell 2650mAh Ni-MH: 856 (est 61.14 lumens)



    Fenix L1D CE - medium - Energizer E2 lithium: 444 (est 31.71 lumens)
    Fenix L1D CE - medium - Kirkland alkaline: 436 (est 31.14 lumens)
    Fenix L1D CE - medium - Duracell 2650mAh Ni-MH: 434 (est 31 lumens)



    Fenix L1D CE - low - Energizer E2 lithium: 121 (est 8.64 lumens)
    Fenix L1D CE - low - Kirkland alkaline: 120 (est 8.57 lumens)
    Fenix L1D CE - low - Duracell 2650mAh Ni-MH: 117 (est 8.36 lumens)



    Fenix L1D CE - max - AW 750mAh 14500: 1656 (est 118.29 lumens)



    After the protection circuit kicked in I let the light cool for a while, then fired it back up in Low mode.

    Fenix L1D CE - low - AW 750mAh 14500 3.51v after Max runtime: 553 (est 39.5 lumens)



    Fenix L1D CE - high - AW 750mAh 14500: 1624 (est 116 lumens) (regulation kicks in at 54 minutes: 888 (est 63.43 lumens)

    Last edited by chevrofreak; 03-07-2007 at 01:46 AM.

  2. #2

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Nice regulation and fantastic graphs!

    Thankyou so much Chevro!
    We love yOOUu!

    .
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    ...\,/..
    Last edited by r0b0r; 03-04-2007 at 11:57 PM.
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  3. #3
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Wow, just awesome Chevro! I have been looking forward for these runtimes a long time, thank you so much!
    And damn, the L2D is quite impressives on nimh. Wonder if any of the other cree-competitiors are even close to having that kind of excellent regulation.

  4. #4

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    My ASCII art su}{orz

    Hope you like that awesome artwork Chevro, that pathetic thing took me far too many presses on the Preview button than I feel entirely psychologically comfortable with ;D
    ~ Current EDC ~ Fenix E0 (belt loop) L1D-CE (holster) Modded LR12W w\Seoul (coin pocket)
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  5. #5
    Flashaholic EssLight's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Thanks Chevrofreak, for all the work and excellent data.

    And no wonder it took so long, an L2D CE on low goes over 2 days continuous running? Over 3 days on lithium batteries?

    The runtime curves on max have some jagged spots. I see similar shapes in both the alkaline and lithium curves. Any idea what causes that?

    EssLight

  6. #6

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Quote Originally Posted by EssLight
    The runtime curves on max have some jagged spots. I see similar shapes in both the alkaline and lithium curves. Any idea what causes that?
    Maybe the circuitry is seeing the battery voltage drop and is switching to a different regulation mode.

    Kevin

  7. #7
    Flashaholic* chevrofreak's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Quote Originally Posted by EssLight
    The runtime curves on max have some jagged spots. I see similar shapes in both the alkaline and lithium curves. Any idea what causes that?

    EssLight
    My guess would be that the circuit is detecting that it is drawing less current than it is wanting to and it makes an attempt to pull even more. That's purely speculation though.

  8. #8
    Flashaholic bridgman's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Wow -- if you ever wanted to explain the difference between alkaline and NiMH batteries those graphs are ideal. Alkaline dies real fast on high, gives maybe 1/3 the runtime of NiMH on high, 60% of NiMH on medium, but almost matches the NiMH runtime on "low".

    Any graph with "5200 minutes" on the x-axis deserves our most prodigious thanks !!
    Trust me, I know what I'm doing...

  9. #9
    *Flashaholic* IsaacHayes's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Awesome work as always!!

    The l2D is really versatile light. Bright as heck, but yet can be a long runtime hurricane light!!
    Mags: 2C: R/O, True Cyan, UV. 3C:Penta-XR-E Q5, Single SSC P4. Nitecore D10, Fenix LOD-CE, ArcAAA

  10. #10

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Fantastic! I love the regulation!
    Look forward to your L1D CE runtime graphs~

  11. #11

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Lookin at the figures. Wow this is a great light man. A good walking light and longlong long runtime with good brightness.

  12. #12
    Flashaholic* Nyctophiliac's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Chevro - you've just given me a new experience!

    Giddy, uncontrolable laughter, looking at runtime graphs????

    (I particularly liked the low one)

    Good job, Sir.







    Be lucky..........

  13. #13

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Thank you very much for going through the trouble of doing these runtime graphs, Chevrofreak. They're immensely helpful to me, I really appreciate your selfless dedication to us.

  14. #14
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Not only do these graphs satisfy people's curiosity about the lights runtime but they let people know how long there light will last in an emergency sittuation. Many thanks for doing these graphs Chevro.

  15. #15

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Does any light in the world have performance that can even touch this? Over 60 lumens on high for 100 minutes on two alkaline cells, or for over 6.5 hours with two lithiums!!!!! That is unreal runtime at that output level. I couldn't imagine a better light for backpacking.


    Chevro,

    Thanks a ton for all your work, I know this light must have been a real bitch to finish. You rock!

  16. #16
    Flashaholic* Thujone's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    I gotta think that these graphs will sell some lights.. They are simply great. Thank you very much for taking the time to do these!
    01001100011010010111011001100101001000000110100101 10111000100000011101000110100001100101001000000110 0100011000010111001001101011
    00101100000011010000101001100001011011100110010000 10000001110100011010000110010100100000011101110110 1111011100100110110001100100
    00100000011010010111001100100000011101000110100001 11001001100101011000010111010001100101011011100110 1001011011100110011100101110


  17. #17

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    wow,awesome. i can't wait to get mine here.

  18. #18
    Flashaholic* WildChild's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Quickbeam! Update your L2D review with these graphes!

  19. #19
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Chevrofreak, I love you man!

  20. #20

    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Thanks a lot for your efforts chevrofreak. This is a great reference.

    I reckon many of the L1D runtimes will be simply slightly less than half of the L2D runtimes.

    Those runtimes on low are awesome.
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  21. #21
    Flashaholic Buckeye's Avatar
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    Yellowlaugh Re: Fenix L2D CE runtime graphs (L1D CE pending)

    111 lumens for 1:50 on AA NiMH!?!? I really liked my L2D CE before now the rest of my lights seem wimpy. I was perfectly happy with my L1P...maybe I need to replace it with the L1D.
    Thanks again Chevrofreak.
    Doug
    Last edited by Buckeye; 03-05-2007 at 08:03 PM. Reason: Clarity
    Nitecore SRT7, Fenix L1D RB100, E0, LOD SE, P3D Ol & LD01 SS, WE 9D Raider, XPG 6V w/DRL 3SM 5A Q3, SF G2 & Z2, Tiablo MA6, FM TL-3 2X18650, 4Sevens Quark 14500 NW, Quark RGBNW, Quark 17670 Tac, Quark 2AA S2, DRL CL1H V4 w/XML T6...

  22. #22
    *Flashaholic* Burgess's Avatar
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    Default Re: Fenix L2D CE runtime graphs (L1D CE pending)

    Chevrofreak -- thank you, sir !



    And this light has such impressive regulation and runtime.


    If i didn't already OWN one, i'd hafta' run right out and ORDER one !


    Thank you for your efforts, Chevro !

    And thank you to FourSevens for your great service.


    Bet these graphs are gonna' sell a LOT of flashlights.

  23. #23
    Flashaholic* AtomSphere's Avatar
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    Default Re: Fenix L2D CE and L1D CE runtime graphs

    chevrofreak, thanks for the graphs. However, my runtime test on the L2D CE on max is 2H10min using the exact same batteries from from the charger at 1.44v.

    Was your charge different?
    I rather have it and not need it, than to need it and not have it.

  24. #24
    Flashaholic* chevrofreak's Avatar
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    Default Re: Fenix L2D CE and L1D CE runtime graphs

    Quote Originally Posted by AtomSphere
    chevrofreak, thanks for the graphs. However, my runtime test on the L2D CE on max is 2H10min using the exact same batteries from from the charger at 1.44v.

    Was your charge different?
    No, mine came off at 1.450v but I think the difference is actually in the forward voltage of the LED and potentially in the minor differences between circuits.

    The forward voltage of the LED will have the most significant impact on the runtime, a lower forward voltage having more runtime and a higher forward votlage having less.

  25. #25

    Default Re: Fenix L2D CE and L1D CE runtime graphs

    Chevro,

    Thanks a ton for the new L1DCE graphs. Man that is one awesome light! 60+ lumens for two hours on one AA cell. I never thought a light that awesome would be available so quickly considering what were had only 1 year ago.

    My question is how come the L91 gives much longer runtime than the 2650 rechargable cell on Low and Medium, but has very similar runtime on high/max? That doesn't make sense to me.

  26. #26
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    Thinking Re: Fenix L2D CE and L1D CE runtime graphs

    I'm a noob; am I right in interpreting the following graph that L1D CE is more efficient than P1D CE?



    Many thanks,
    KK

  27. #27
    Flashaholic* chevrofreak's Avatar
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    Default Re: Fenix L2D CE and L1D CE runtime graphs

    Quote Originally Posted by kurni
    I'm a noob; am I right in interpreting the following graph that L1D CE is more efficient than P1D CE?



    Many thanks,
    KK
    That is a possibility, but I think it is more likely that one of the cells doesn't have the claimed capacity, or that one has more than the claimed capacity.

  28. #28
    Flashaholic* Ty_Bower's Avatar
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    Default Re: Fenix L2D CE and L1D CE runtime graphs

    Quote Originally Posted by chevrofreak
    That is a possibility, but I think it is more likely that one of the cells doesn't have the claimed capacity, or that one has more than the claimed capacity.
    Is it also possible that one of the lights on the graph has a Cree with a much better forward voltage? I understand there is quite a bit of variation in the Vf of these Crees.
    The only reason a great many American families don’t own an elephant is that they have never been offered an elephant for a dollar down and easy monthly payments.

  29. #29

    Default Re: Fenix L2D CE and L1D CE runtime graphs

    Quote Originally Posted by chevrofreak
    That is a possibility, but I think it is more likely that one of the cells doesn't have the claimed capacity, or that one has more than the claimed capacity.
    I've run a lot of discharge tests on NiMH cells. Almost none have the claimed capacity, and some are more blatantly overrated than others. But I also found something that most people don't realize -- there's a large difference in how completely various chargers charge the cells. So even people using the very same cells can get some pretty different results.

    Please add my thanks for all the great work!

    c_c

  30. #30
    Flashaholic* Oddjob's Avatar
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    Default Re: Fenix L2D CE and L1D CE runtime graphs

    Thanks for the graphs!
    I'd rather have it and not need it than need it and not have it.

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