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Thread: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

  1. #31
    Flashaholic Bazar's Avatar
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    Default Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Quote Originally Posted by WalkIntoTheLight View Post
    Quote Originally Posted by Fireclaw18 View Post
    OP specifically says on the first line of his post: "What flashlight can guarantee at least 1,000+ Lumens and 3 hour burn time?"

    He's not looking for 900 lumens. He's specifically looking for a light that can do 1000+ lumens for 3 hours.

    I assume he wants 1000+ lumens for a constant 3 hours. And because he mentioned the 21700 Zebralight, I assume he probably also wants it in a semi-pocketable format... meaning probably not a soda can size light.
    If that's what he requires, then his only option is to wait a couple of years until battery tech has caught up to his demands. He's not asking for something totally unreachable, but we're not quite there yet in a pocketable size. Unless he considers a multi-cell light pocketable.

    Zebralight + spare cell is probably the most efficient option.
    I'm wondering if you thing the TM 10k Nitecore could get this set up. it is pretty much pocketable and has a programmable flat regulated mode. For a Price though.
    My Favorite owned: Acebeam T21VN Oslon, Acebeam X80GT, Emisar D4TI 18350 hi LED, Fenix TK75 '15, Fenix FD20. Other: Fenix tk09, Emisar D4 hcri LED, Fenix BC30, Fenix tk32 '15, Coast polysteel full line, Coast g10.

  2. #32
    Flashaholic Bazar's Avatar
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    Default Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Quote Originally Posted by WalkIntoTheLight View Post
    Looking at the XHP70.2 datasheet, the highest bin seems to put out 2164 lumens at 1050mA. Eye-balling the voltage curve at that level, and it seems to require 11.2v.

    So, that's an efficiency of 184 lumens/watt.

    You'd need 5.435 W for 1000 lumens, or a 16.3 Wh cell for 3 hours of use. That's a 4400 mAh cell, which is currently available in a 21700 format.

    However, that all assumes 100% efficiency of the boost-driver and optics. Realistically, you should probably drop that by 20% or more.

    Maybe we're closer than I thought. You'd still have to find the perfect light to output 1000 lumens exactly.
    and it would have to be without a lens or bezel, these real-world flashlight things impede light after production, so even with internals, your externals would have to be pure flood and an exposed LED.
    My Favorite owned: Acebeam T21VN Oslon, Acebeam X80GT, Emisar D4TI 18350 hi LED, Fenix TK75 '15, Fenix FD20. Other: Fenix tk09, Emisar D4 hcri LED, Fenix BC30, Fenix tk32 '15, Coast polysteel full line, Coast g10.

  3. #33
    Flashaholic* RobertMM's Avatar
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    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Acebeam K30GT will give 5 hours at 1000 lumens, on 3x3100mAh 18650 if you are willing to put up with a bit bigger size.
    "Tint is within the eye of the beholder." - WoodsWalker

  4. #34
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    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Quote Originally Posted by Bazar View Post
    and it would have to be without a lens or bezel, these real-world flashlight things impede light after production, so even with internals, your externals would have to be pure flood and an exposed LED.
    Yeah, not do-able yet. But likely not too far off. Anyway, this is just a hypothetical discussion now, since I doubt the OP has read any of the replies.

    Anyone know what is the most efficient small-ish light that can do around 1000 lumens? Is it the Zebralight SC700d, or is there something more efficient. Since the Zebra is high CRI, I'm thinking there's got to be some ugly cool-white version that is more efficient.

  5. #35

    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Quote Originally Posted by Bazar View Post
    I'm wondering if you thing the TM 10k Nitecore could get this set up. it is pretty much pocketable and has a programmable flat regulated mode. For a Price though.
    Nitecore's own published ratings for the TM 10K say that at 1,000 lumens it runs for 2 hours.

    So it doesn't look like it's going to fit OP's requirements.

  6. #36
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    archimedes's Avatar
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    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Has OP returned to clarify, greater than 1000 OTF continuous lumens throughout ? Obviously due to heat-sinking and battery sag, keeping the latter part of the 180 minute run above 1Klm becomes more challenging.

    It is, of course, fine if this is some sort of semiarbitrary technological bar that has been set.

    The discussion has been interesting and informative in that regard, but if there is a particular purpose or use case to try to meet instead, more details regarding the specifics would help us to better help OP.
    Last edited by archimedes; 12-02-2019 at 06:28 PM.
    ... is the archimedes peak

  7. #37

    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    The Acebeam EC50 advertises 1000 lumens for 2 hours and 48 minutes using a 26650 battery - pretty close to your request, although not quite there. It will have a relatively floody beam - optimized for closer use, wide illumination, not long distances.

    If you want to be certain of continuous high output, you should plan on a multi-cell light like the BLF/Sofirn Q8, Sofirn SP36, Fireflies ROT66, Emisar D18, or Thrunite TN30 and TN36.

  8. #38
    Flashaholic Bazar's Avatar
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    Default Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Quote Originally Posted by archimedes View Post
    ... Obviously due to heat-sinking and battery sag, keeping the latter part of the 180 minute run above 1Klm becomes more challenging.
    case...
    I like the Acebeam L30 ii for the same reason I hate it. the 1000 lumen mode is a hold that never sags. however the price, is that when it depleted its power, it shuts off with absolutely no warning.
    My Favorite owned: Acebeam T21VN Oslon, Acebeam X80GT, Emisar D4TI 18350 hi LED, Fenix TK75 '15, Fenix FD20. Other: Fenix tk09, Emisar D4 hcri LED, Fenix BC30, Fenix tk32 '15, Coast polysteel full line, Coast g10.

  9. #39

    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    cool white xhp70.2 is such high luminous efficacy that I doubt heat is an issue for smaller hosts.

  10. #40
    Flashaholic* fivemega's Avatar
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    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    Obviously larger cells like 26650 have more capacity and better than that 2P 18650 or even 4P 18650

  11. #41

    Default Re: Looking for 1,000+ Lumens & 3 hour burn time??? Recommend

    By the way, the same shade was not indicated, maybe it makes sense to contact those who make custom budget lights? Then can put a suitable driver, the body on 4 * 20700 and 3*n diodes with a temperature of 7-8 kk for greater efficiency?

  12. #42
    Flashaholic Bazar's Avatar
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    Default

    Quote Originally Posted by fivemega View Post
    Obviously larger cells like 26650 have more capacity and better than that 2P 18650 or even 4P 18650
    . . . . . . you are thinking only in mah not in voltage. a 6000 mah cell is about equal to 2 18650 cells in watt hours, 23 watt hours vs 23 watt hours. still shy of nessicary and only 1 26650 can do it and it's 28 dollars. some 18650 can exceed that performance with 14 watt hours, times 2, or 28 watt hours. If Nitecore tried to or you rebuilt their light the tm10k should be able to have 3 hours at 1000 lumens but would no longer have a 10k lumen max killing the namesake. now, a 3 18650 makes sense, or even perhaps for space a 3 18500 light would be very compact.
    Last edited by Bazar; Yesterday at 09:07 PM.
    My Favorite owned: Acebeam T21VN Oslon, Acebeam X80GT, Emisar D4TI 18350 hi LED, Fenix TK75 '15, Fenix FD20. Other: Fenix tk09, Emisar D4 hcri LED, Fenix BC30, Fenix tk32 '15, Coast polysteel full line, Coast g10.

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