Here is one for a DIY- Mtbr.com
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  1. #1
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    Here is one for a DIY

    For the price this is pretty impressive even for a novice to knock up and get a cheap light set-up going.

    http://www.rotorburn.com/forums/showthread.php?t=176859

  2. #2
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    Reputation: Jim Z in VT's Avatar
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    Clever and simple. Dude should buy a new helmet though!

    JZ
    It's not about speed, it's about lack of control.

  3. #3
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    Yeah the helmet is a disaster isn't it

  4. #4
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    Very simple, does it use a driver? What good battery / battery combination to use. Want to hear words from expert DIY'er here. What can you say about this light?

  5. #5
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    Reputation: Jim Z in VT's Avatar
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    Expert DIYer? I won't make any claims like that! But I think these led replacement units for track lights are self-contained....whatever driver circuit is needed is built into the unit.

    He's using 10 x AA batteries for a nominal 12v, and I expect any 12v source would work.

    I do wonder about the beamshot, and what settings were used, because it seems unusually good for a single 3w LED.

    JZ
    It's not about speed, it's about lack of control.

  6. #6
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    Quote Originally Posted by JimZinVT
    Expert DIYer? I won't make any claims like that! But I think these led replacement units for track lights are self-contained....whatever driver circuit is needed is built into the unit.

    He's using 10 x AA batteries for a nominal 12v, and I expect any 12v source would work.

    I do wonder about the beamshot, and what settings were used, because it seems unusually good for a single 3w LED.

    JZ
    That's something that had me puzzled that light unit I think I read was 170 lumens and if that is the case not knowing much about it the image sure portrays it with allot more lumens in my opinion.

  7. #7
    PCC
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    The first thing I noticed was how beat up that helmet was. It's probably been due to have been replaced a season or two ago!

    If you follow the link in that thread you will see that the lamp is rated between 8 and 16V. It'll run on either AC or DC as well. It's a 25 degree beam angle and a 15 degree beam angle is available as well for cyclists.

    WRT to the beamshot, the camera was probably set to automatic exposure. Still, at 170 lumens it beats my Minewt Mini-USB by about 60 lumens.

  8. #8
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    Quote Originally Posted by PCC
    The first thing I noticed was how beat up that helmet was. It's probably been due to have been replaced a season or two ago!

    If you follow the link in that thread you will see that the lamp is rated between 8 and 16V. It'll run on either AC or DC as well. It's a 25 degree beam angle and a 15 degree beam angle is available as well for cyclists.

    WRT to the beamshot, the camera was probably set to automatic exposure. Still, at 170 lumens it beats my Minewt Mini-USB by about 60 lumens.
    Simply looking on the beamshot, i cant believe its 170 lumens, probably higher, its so bright. Any suggestion of battery combo best for it, 10 pcs so many i think. Any by the way, hope to see more beamshots of this light.
    Last edited by roel; 06-16-2009 at 04:25 PM.

  9. #9
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    Generally the built up units use older, less efficient leds.
    Beamshots are misleading, see how bright the sky is?
    3W led beating a 20W halogen(300-400lm)?

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