Little XPE Helmet Light- Mtbr.com
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  1. #1
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    Little XPE Helmet Light

    As usual, that to everyone for all of the help. The lights are certainly getting easier to build. I wanted something small so I tried the 4 of the little XPE lights with the 10mm square optics. They are running on a buckpuck @ 700mA with a 14.8v battery. The 4 XPE's don't appear to be as bright as 3 standard R2's, but the light is 1/2 of the size. I'm looking forward to trying the 3x XPE's and building a double of some sort. Soldering and mounting the optics is a royal pain. Thanks guys!
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  2. #2
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    That is a nice little light , what are the optics the narrow tight.

    we now need tiny drivers for these things

    they may be a tad easier to mount with the new square boards

    and come on where is it

  3. #3
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    It's the middle of the afternoon here. The optics are the narrow spot. I was looking to get as much throw out of the lights as possible. A micro driver would be sweet. The tube could be considerable shorter.

  4. #4
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    My 4 up XPE is 46 mm long. Not too bad.

    The Fatman does take up less room than the Buckpuck. Could shave another 5 or 6 mm off if I wanted to compared to my buckpuck version.
    Are you running your 4 XPE in series? So each is getting 700 mA?
    I ran one of mine as 2S2P with the 1000 mA buckpuck, so 500 per emitter. It is very bright.

  5. #5
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    Yes, all 4 XPE's are in series so each one is getting 700mA. It could be shorter if I used a flat piece of aluminum for a end plate. It's got one of those black furniture tubing caps on the back end and it takes up a bit of room. odtexas: I like the look of the light on the left. Where did the channel pieces on the side come from?

  6. #6
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    The light on the left is 3/8's by 1 inch flat bar stock with grooves cut into it with the table saw.

  7. #7
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    Sorry to take so long. MTBR camera settings:
    first photo is control
    2nd is standard 3x Cree R2 light
    3rd is the 4x XPE light
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  8. #8
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    Vey nice, it does look a bit brighter than the triple R2, amazing how much light can be projected from such small optics.

    How is the 14.8v battery coping with the extra LED?

    And is that a MC-E build going on in the background in you first pics?

  9. #9
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    So far the batteries haven't had much of a workout. We've had a long warm spell so the trails are soup. I have a lot of hopes for the little light as a replacement helmet light. I'm more concerned about the 4400mA battery that will run the 2x MCE that is in the background. I haven't had a lot of free time to do a good comparison between the optics. So far the ledil square optics have the best punch. I took pics of the MCE but couldn't get them resized in order to post.

  10. #10
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    Try emailing the pics to yourself, the ones you receve should be smaller and you can post them on here.

    Mad but that's what I do.

  11. #11
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    Nice shots there.
    For pics you can also open a free account at photobucket.com. When uploading you have the option of having your file resized. Comes in handy once you know its there.

  12. #12
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    Quote Originally Posted by yetibetty
    Try emailing the pics to yourself, the ones you receve should be smaller and you can post them on here.

    Mad but that's what I do.
    Everything else that I tried was mad, so what the hell.

  13. #13
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    if you are using mr gates software then you can use
    micro soft image resizer even I can use it

  14. #14
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    Troutie- Thanks for the image resizer link. It's super easy!!!

    Dual MCE light in the same setting.
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