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Thread: Decent RED powerLED AA flashlights

  1. #31

    Default Re: Decent RED powerLED AA flashlights

    red filters are extremely inefficient
    here is one that loses 91% of the output
    http://www.leefilters.com/lighting/c...#106&filter=cf

  2. #32

    Default Re: Decent RED powerLED AA flashlights

    Quote Originally Posted by jon_slider View Post
    red filters are extremely inefficient
    here is one that loses 91% of the output
    http://www.leefilters.com/lighting/c...#106&filter=cf
    And it still lets through a lot of the yellow and all of the orange frequencies.

  3. #33
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    Default Re: Decent RED powerLED AA flashlights

    I wonder how efficient the Surefire Red Filters are?

  4. #34

    Default Re: Decent RED powerLED AA flashlights

    Quote Originally Posted by AstroTurf View Post
    I wonder how efficient the Surefire Red Filters are?
    looks like about 9% light transmission
    http://www.leefilters.com/lighting/c...#106&filter=cf

  5. #35

    Default Re: Decent RED powerLED AA flashlights

    I think some of the filter efficiency is related to the amount of red output of the LED itself a warmer color LED may lead to higher output vs a cool white LED.
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  6. #36
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    Default Re: Decent RED powerLED AA flashlights

    Thanks Jon

    Quote Originally Posted by jon_slider View Post
    looks like about 9% light transmission
    http://www.leefilters.com/lighting/c...#106&filter=cf

  7. #37
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    Default Re: Decent RED powerLED AA flashlights

    A very good point.

    Quote Originally Posted by Lynx_Arc View Post
    I think some of the filter efficiency is related to the amount of red output of the LED itself a warmer color LED may lead to higher output vs a cool white LED.

  8. #38

    Default Re: Decent RED powerLED AA flashlights

    Quote Originally Posted by Lynx_Arc View Post
    I think some of the filter efficiency is related to the amount of red output of the LED itself a warmer color LED may lead to higher output vs a cool white LED.
    it does not make sense to put a red filter on a low CRI LED. That is an extremely inefficient way to PRODUCE red light. Especially since Low CRI LEDs make almost no Red to begin with



    IF you want to use an LED to produce Red, the best way is to use an LED that is specialized for that purpose.

    Putting a red filter on any "white" LED, wastes the majority of the light being produced.

    examples: sw45k LED


    then add a filter that allows less than 10% of the light to pass through:


    result:


    Red 660nm LED:


    on right is the Red 660nm LED


    see what I mean?
    the sw45k, filtered, produces 1.6 lumens

    the red 660nm LED produces 5 lumens
    Last edited by jon_slider; 09-15-2020 at 10:22 AM.

  9. #39

    Default Re: Decent RED powerLED AA flashlights

    Wow. You've become a monster of light information and demonstration. Thanks for all that.

  10. #40
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    Default Re: Decent RED powerLED AA flashlights

    ... a teasure trove of information!

  11. #41
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    Default Re: Decent RED powerLED AA flashlights

    Very glad I found this thread. I have been wanting a good true red LED light for a long time, preferably something with more punch than a AAA. I love HDS lights and thought about getting one with the red LED option but didn't think I would use it enough to justify the cost. Now I see they have dropped the red LED option so it's a moot point.

    I had not thought of checking with Vinh on modding a Zebralight SC52. I thought I had read a post from him some time ago that he wasn't able to open a Zebralight without destroying it. I'm a big Zebralight fan (I have an SC62w in my pocket right now). I will definitely be watching this thread.

  12. #42

    Default Re: Decent RED powerLED AA flashlights

    Ah, wow... I can't believe HDS dropped a red LED option. I wonder why they would do that? Still have blue, green, and IR... What is the difference between providing one LED option and the next (rhetorical)? Maybe if when ordering, one offers to send HDS the red LED one wants?

  13. #43

    Default Re: Decent RED powerLED AA flashlights

    Quote Originally Posted by rumack View Post
    I have been wanting a good true red LED light for a long time
    afaik Zebras cannot be modded
    Im sending you a PM

  14. #44

    Default Re: Decent RED powerLED AA flashlights

    Nah, Vinh got into one a few years ago, and could have modded it and offered the mod, but decided there was no point in modding it. It was already plenty ampy. There's a thread about it in his forum section. Vinh has so much work, so little time, his work comes at a premium. No deals. So I'll likely eventually go with your suggestion because my income sucks.
    Last edited by chillinn; 09-21-2020 at 02:02 AM.

  15. #45

    Default Re: Decent RED powerLED AA flashlights

    Discovered another red light, head lamp, Armytec Wizard WR claims Red OTF 250Lm and White OTF 1000Lm. It is out of stock at Armytec, but can be found on Amazon. There are a number of multiLED lights, but usually include Green and Blue also, so I thought this one interesting for just Red and White, and claims very bright in both spectrums.

    Interestingly, Cree developed and made available an LED with both Red and White light built in, but the White was as cool as it can get, and I've never seen any flashlight that utilized for it. Cree also makes RGBW LEDs, and if someone developed a driver that could mix the colors in correct variances, any color should be possible.
    Last edited by chillinn; 09-21-2020 at 02:10 AM.

  16. #46
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    Default Re: Decent RED powerLED AA flashlights

    I would find an old 4sevens quark and put an xpg-3 in it. Easy mod.
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  17. #47
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    Default Re: Decent RED powerLED AA flashlights

    Quote Originally Posted by jabe1 View Post
    I would find an old 4sevens quark and put an xpg-3 in it. Easy mod.

    Yup, I found a pair of M59 Hilka`s for £5 each, they`re So easy to mod! and I have a batch of 10x 730nm leds already MCPCB mounted and a few Warm whites as well. so pretty much any color I want up to 3W.
    I think it`s the next logical step really, if you can`t buy it, Make it!

  18. #48

    Default Re: Decent RED powerLED AA flashlights

    Found another really nice light configurable in red, but not AA, 18650 Noctigon KR1 w/ W1 Red Osram CSLNM1.23 single emitter in 617nm, Andúril ramping interface, and 18350 tube available. Probably pretty bright at that lower red wavelength, and surely throws with that big reflector.
    Last edited by chillinn; 10-11-2020 at 08:48 PM.

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