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Thread: Ranking the popular emitters by surface brightness

  1. #1
    Flashaholic
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    Default Ranking the popular emitters by surface brightness

    Given the somewhat recent introduction of new and updated emitters like the MT-G2, SBT-70 and the second generation of the XP-G and XM-L, I was wondering if someone could rank the top five or ten most popular emitters in terms of their surface brightness when run at their max recommended drive level. No lab numbers are necessary, I'm just looking to keep it simple with the relative rankings.

    I'd also be curious to know if any jump significantly out of their place in line when all are reasonably overdriven.
    --Semper Fi--
    Bill

  2. #2
    Flashaholic* AnAppleSnail's Avatar
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    Default Re: Ranking the popular emitters by surface brightness

    I would do this by putting the apparent die size and lumen output in a spreadsheet, then dividing. Without overdriving, there are also options like de-doming to decrease apparent die size. However, I don't have time to do the first step!

    Overdriving might be more linear than you expect, except that some LEDs tolerate more ridiculous overdrive than others.
    My biggest light-hog is my camera.

  3. #3
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    Default Re: Ranking the popular emitters by surface brightness

    xp-e2 for the victory!

  4. #4
    Flashaholic* LilKevin715's Avatar
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    Default Re: Ranking the popular emitters by surface brightness

    Dr. Jones did this a while ago here but the info hasn't been updated in a while. I guess this a good time to update his old chart with some newer emitters.
    My Mag Mods: SST-50 , XM-L

  5. #5
    Flashaholic* degarb's Avatar
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    Default Re: Ranking the popular emitters by surface brightness

    Quote Originally Posted by MichaelW View Post
    xp-e2 for the victory!
    http://www.cree.com/LED-Components-a...onal/XLamp-XQE ?
    Some people are all lumens and no lux, while others are all lux and no lumens. Some just thank God they have neither.-- All of my lights have throw--some pretty darn far, into the garbage.

  6. #6

    Default Re: Ranking the popular emitters by surface brightness

    That would probably make the best throwing, single AA size flashlight. I'm wondering if you could get 200 lumens/10,000 lux OTF from a 7/8" diameter body reflector?

  7. #7
    Flashaholic* AnAppleSnail's Avatar
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    Default Re: Ranking the popular emitters by surface brightness

    Quote Originally Posted by LilKevin715 View Post
    Dr. Jones did this a while ago here but the info hasn't been updated in a while. I guess this a good time to update his old chart with some newer emitters.
    Here it is, somewhat updated. I forgot Ra's excitement over optical-bonded heatsinks.
    My biggest light-hog is my camera.

  8. #8
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    Default Re: Ranking the popular emitters by surface brightness

    Isn't the XQE identical to the XP-E2 but just "cropped" close to the die? Can't find many pics, but also seems like the dome is sort of wavy/frosted, wonder how that effects things?

  9. #9
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    Default Re: Ranking the popular emitters by surface brightness

    Surface brightness is critical for throw, but usually there is a trade off between LED surface brightness and color rendering. The importance of color rendering in night vision is complicated, but significant.

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