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  1. #1
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    1100lm XPG 'K-lite race' weight weenies LED bike light

    [SIZE="6"]Introducing the K-lite race[/SIZE]

    [SIZE="4"]a striped down racing light for weight weenies & racers...[/SIZE]

    Super lite, super bright, Lm per gram, the lightest on earth...for now..
    1100lm max, fully user programable via a constant current regulator, no PWM flicker here
    Battery & thermal protection
    Handle bar remote switch w battery warning LED built in
    Data port for temp logging
    Only 186g! incl battery (race version)

    klite3.jpgklite1.jpg

    batt1.gif

    clamp1.gif

    clamp2.gif

    Beam shots after dark

    more specs soon

    [SIZE="4"]Avab soon as DIY kit, light & 18560 batt holder (no batts), Full kit[/SIZE]
    Last edited by ktronik; 10-06-2009 at 11:46 PM.

  2. #2
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    This ain't no "weight-weenie" light.
    Here is a real weight-weenie light - http://lux-rc.com/view.php?p=content/showcase


    OK, it uses the old SSC P4 U2, but the weight of the entire light is 12.2g.

    As far as I know, this guy is planning a newer design.

  3. #3
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    Quote Originally Posted by zemike
    This ain't no "weight-weenie" light.
    Here is a real weight-weenie light - http://lux-rc.com/view.php?p=content/showcase


    OK, it uses the old SSC P4 U2, but the weight of the entire light is 12.2g.

    As far as I know, this guy is planning a newer design.
    Thanks for pointing that out to me...

    Peak Temperature of 80c, ouch, I hope that's not the case temp... I guess its hard to cool things with only 12g of mass... come on a real bike light...next...

    K

  4. #4
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    1 things 1: This Light was aweasome still with the XP-E's! But now....
    Amazing light with the XP-G's, now they are available! Congrats Ktronik

    Are you planning to make 4up XP-G' version also? That would be the top end...



    Quote Originally Posted by zemike
    This ain't no "weight-weenie" light.
    Here is a real weight-weenie light - http://lux-rc.com/view.php?p=content/showcase


    OK, it uses the old SSC P4 U2, but the weight of the entire light is 12.2g.

    As far as I know, this guy is planning a newer design.
    This lighthead is lightweight but has nothing near 1100L and no Battery!!
    No comparison possible!

  5. #5
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    Quote Originally Posted by zemike
    This ain't no "weight-weenie" light.
    Here is a real weight-weenie light - http://lux-rc.com/view.php?p=content/showcase


    OK, it uses the old SSC P4 U2, but the weight of the entire light is 12.2g.

    As far as I know, this guy is planning a newer design.
    It's certainly a cute one... it's a lighthead designed for an RC car. If you don't need much light it might work for you... but 240 lumens doesn't cut it for most MTB riders. Just not safe.

    I'll take the 1000-1200 lumen lighthead at 70g-80g developed by ktronik or zen bicycle's lights.



  6. #6
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    [SIZE="4"]BEAMSHOTS!!![/SIZE]

    Thanks to mtbikerTi for these rollovers!!



    Last edited by ktronik; 10-11-2009 at 03:43 AM.

  7. #7
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    That triple's gonna be a wall of light fo sho...

  8. #8
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    I must say on the bottom pic, its not as big of a difference as the pic would have you think...



    This is more like the real difference...note the 'flaring' off the tree to the right middle...top XPG pic...Still lots of light in this area, smoothly extending out to the edge...

    My camera can play tricks sometimes even when on full manual...

    K
    Last edited by ktronik; 10-11-2009 at 03:44 AM.

  9. #9
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    Doing a little research...for my Ayup killer...

    lets have a look shell we...

    Ayup batt (6hrs @ 340lm) 140g
    K-lite batt (7hrs @ 200lm) 104g

    Ayup light 58g (340lm Max)
    K-lite light 70g (1100lm Max)

    Total Ayup 198g
    Total K-lite 186g

    So 12g lighter than the Ayup, over 3 times the output as the Ayup & CHEAPER than the Ayup for $ per lm (compared to the Ayup MTB kit)

    Yep its a great MTB race light, I am really happy with it..

    K
    Last edited by ktronik; 10-07-2009 at 06:27 AM.

  10. #10
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    Quote Originally Posted by Whitedog1
    This lighthead is lightweight but has nothing near 1100L and no Battery!!
    No comparison possible!
    A comparison is possible - lumens per gram
    15 lm/g for 3 XPG
    19 lm/g for this lighthead

  11. #11
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    Quote Originally Posted by zemike
    A comparison is possible - lumens per gram
    15 lm/g for 3 XPG
    19 lm/g for this lighthead
    with or without battery?

  12. #12
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    Are these beamshots a single or triple XPG?

  13. #13
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    Quote Originally Posted by Whitedog1
    with or without battery?
    I think he ment with out battery, I guess he is trying to prove a point...what would be good is if he could also take into account light loss due to high Tj temp...



    as peak temp of 80 deg is a lumen killer, hope this is the Tj temp as if its not & its the MCPCB or case temp then, Tj temp is surely higher...

    Here is my thermal data...full blast 1000ma (1000lm+) up hill all the way, with a down hill @ the end...(temp- back of MCPCB)



    I think if you cal the total lumen again for your Lm/g it will be a bit closer...

    K
    Last edited by ktronik; 10-07-2009 at 06:31 AM.

  14. #14
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    Quote Originally Posted by Whitedog1
    with or without battery?
    Come on! Of course it is without battery. You could have found out this by yourself - it is not rocket science, its merely elementary school mathematics.

  15. #15
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    Quote Originally Posted by roadie_scum
    Are these beamshots a single or triple XPG?
    Triple XPG & XPE

  16. #16
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    What is the ambient outside temp when you completed your temp test?

  17. #17
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    Quote Originally Posted by tamen00
    What is the ambient outside temp when you completed your temp test?
    sorry my bad... 17-18 deg C....

    K

  18. #18
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    IMHO the XPE beamshots look better than the XPG. Maybe an XPG based light on the bars and XPE for the helmet. I guess I like the tighter beam.

  19. #19
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    Is is possible to post some photos of the beam focused on something far away?
    It looks like the xpes may make better throwers.

  20. #20
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    Quote Originally Posted by ktronik
    sorry my bad... 17-18 deg C....

    K
    Great!! Thanks for the information... much appreciated! I have XPE's that are driven at 500ma in a very similar housing that do not even get warm to the touch at 17-18 deg but get very warm (not quite hot - hot) when the ambient temp starts going above 32 - even while moving (living in the desert sucks... )

    Were these measurements done at 500ma to each led (I think that is what the table is showing)? If that is the case, what happens to the temp if you run the light on full power to get the full 1100 lumens.. or was this test done at 1000ma? It it is at 500 ma... thats awesome because it matches what I am planning... but if it is at 1000ma... SUPER AWESOME!!!

    It would be cool if you could do temp measurements at a higher ambient sitting on a desk or something with no moving air I am just being greedy... the info you have provided so far is really great... thanks a lot for doing all of this for all of us awaiting our cutter orders!

  21. #21
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    This makes it easier to compare:








    XPG does look like it loses some throw , I wonder what it'll do with the 10mm optics.

  22. #22
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    hey, what bar mount is that? nice light

  23. #23
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    mtbiker
    Now that is good Particular the top one the middle one is a bit missleading as the aim point changes .

    Looking at the top set though the throw is still there but yes a wider beam IMHO I like the XPG shot even if it looks a floodier beam
    if you look at the centre left farthest tree it does not change from shot to shot

  24. #24
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    Are these with the 20mm triples Kerry?

    xpe's @ 700ma or 1A ??

  25. #25
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    Thanks for posting KTRONIC.

    Throw is hard to judge from those picsbut the beam spread is nice. Maybe a mix of xpg with a couple of warmer tint xpe in there for tint and throw might work well.

    Thanks again for being so quick with the pics, pity everyone else is dragging the chain

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