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  1. StarHalo

    LED nerds. Any help with Lumens? How are they measured?

    I'm not previously aware of the use of a degree rating to measure lumens; typically if you account for the beam shape of the emitter, it's to express in lux/cp what the throw of the beam is, not the output. Otherwise, if you're going to provide a lumen rating, especially for a bare emitter, it...
  2. StarHalo

    LED nerds. Any help with Lumens? How are they measured?

    I can always discern Millie and her dog :thumbsup:
  3. StarHalo

    LED nerds. Any help with Lumens? How are they measured?

    You need at least a 10% difference in output before you can discern any difference by the eye, so a 685 and 725 lumen emitter side-by-side would appear identical.
  4. StarHalo

    Tint perception depends on ambient light white balance of the users brain

    ..and the next thread about white balance will be someone asking for a "true white" light and then a dozen posts giving a single Kelvin number that they think/feel/have a hunch is the one true white tint.
  5. StarHalo

    Best Maglite 1D Modification

    Always wanted to do a 3xAA holder to power a Malkoff XM-L drop-in; 700+ lumens with potted electronics in a 1D package..
  6. StarHalo

    How much radiation can an LED flashlight stand?

    The U.S. National Council on Radiation Protection & Measurements estimates that household smoke detector use causes a radiation dose of 9-50 nSv (nanosievert) per year. The dose received from eating a banana is about 100 nSv. I've seen Americium in a cloud chamber, hard to miss, still haven't...
  7. StarHalo

    How much radiation can an LED flashlight stand?

    Those are the most radioactive substances the average person encounters daily; a banana is ~1,500 times more radioactive than a smoke detector.
  8. StarHalo

    How much radiation can an LED flashlight stand?

    The old school superpower war idea is that both sides lose - you begin with an EMP attack so the other side has no communication/coordination, then strike their strike capability so they can't defend. But if both sides can anticipate that, then you just end up with both sides blind and...
  9. StarHalo

    How much radiation can an LED flashlight stand?

    The two likeliest EMP scenarios are a full nuclear attack starting with an EMP-specific extra-atmospheric burst, which could be sufficient to black out a few states with zero blast/heat/radiation on the ground (followed by strikes on the aforementioned air bases and silos, so no radiation for...
  10. StarHalo

    How much radiation can an LED flashlight stand?

    We're talking downtown Hiroshima levels of radiation, which unless you're living on an airbase/next to a silo isn't a remotely realistic scenario. EMP is the far likelier event, which anything stored shielded survives equally.
  11. StarHalo

    How much radiation can an LED flashlight stand?

    A dude on Reddit says it's because the air is ionized, which would mean the battery already has charges going on at both ends even without a circuit, so when you try to connect a circuit it won't do anything. Sounds logical..
  12. StarHalo

    How much radiation can an LED flashlight stand?

    Their old school direct drive incan lights should have weathered those sub-insta-lethal conditions fine, so there may be a grain of truth to Byk's hypothesis; if dynamo lights work but battery lights don't, then it'd have to be something to do with the battery not holding up to gamma ray...
  13. StarHalo

    1000 lumen HDS

    1. As a Zebralight guy, it's never occurred to me to compare it to HDS lights; apples and oranges. 2. Everyone's comparing Zebralights to HDS because they want a 1000+ lumen rotary light. 3. There's no need to make it political, everyone just calm down and have Alex make you a drink:
  14. StarHalo

    1000 lumen HDS

    Upload to Imgur, under "Get share links", copy the "BBCode (Forums)" link, paste in your text here.
  15. StarHalo

    1000 lumen HDS

    Okay. Huh?
  16. StarHalo

    BLF GT “Giggles” Flashlight Review

    But does it cloud bounce?
  17. StarHalo

    I'm in love

    The Zebralight is a few dimes-widths longer, but uses significantly thicker Al and outputs 0.2 to 2,400 lumens.
  18. StarHalo

    I'm in love

    No Zebralights yet?
  19. StarHalo

    Very small 1000L pocket rockets?

    The catch with the high-output micro lights like that is the turbo rating is just for a few moments, you're not actually going to be able to walk around for a while at ~1,000 lumens. If you can hedge a bit on the size, up to 18650 format, the current Zebralight SC600 can give you 0.2 - 2,400...
  20. StarHalo

    Old Timer Poll

    XM-L was after 2006, no?

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