1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

A question about lumens.

Discussion in 'Electric Bicycles' started by Gubbins, Sep 25, 2017.

  1.  
    anotherkiwi

    anotherkiwi Pedelecer

    Joined:
    Jan 26, 2015
    Messages:
    4,570
    Likes Received:
    1,443
    Location:
    The European Union
    My arms aren't 1.50 meters long... :rolleyes:

    I found your light output very underwhelming in the video tbh. Like in Germany it is illegal to ride with more than one light on the front of a bike here. Something to do with differentiation between type of vehicle. And the legal minimum is 15 lux which I bet many old fashioned lights (before halogen bulbs) don't even reach.

    When I reinvest in the trike's equipment I will put a 150 lux high end e-bike light on the front and chuck a 4S Lipo in a beam bag to feed it. It should be good for up to 90 km/h... :D
     
    • Informative Informative x 1
  2.  
    Gubbins

    Gubbins Pedelecer

    Joined:
    Mar 14, 2014
    Messages:
    3,530
    Likes Received:
    1,128
    Location:
    North UK where men are men and Sheep are Nervous
    Light output is really hard to gauge fron on board footage.. I have filmed mine which really light up the woods only to find that on the video it appears disappointing and nothing like reality..
     
  3.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    #43 soundwave, Sep 28, 2017
    Last edited: Sep 28, 2017
  4.  
    asc99c

    asc99c Finding my (electric) wheels

    Joined:
    May 1, 2015
    Messages:
    55
    Likes Received:
    8
    Yeah, floodlights look better on videos as it looks like the whole scene is evenly lit. Anything with a more directed beam tends to cause the camera to reduce exposure and then everything else looks dark.

    Sent from my ONEPLUS A3003 using Tapatalk
     
    • Informative Informative x 1
  5.  
    anotherkiwi

    anotherkiwi Pedelecer

    Joined:
    Jan 26, 2015
    Messages:
    4,570
    Likes Received:
    1,443
    Location:
    The European Union
    SW b+m have taken all those bits and put them in a really nice water resistant case with a better reflector giving a correct beam shape for on road use and a mounting system for me. They also had it certified by German Road Safety. For 47 €... On the road you don't need to light the tree tops, you need a flat, wide, long and bright beam on the tarmac.
     
  6.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    but that was pumping out 2000lm no bike light has a xhp 70 led in it last time i looked ;)
     
  7.  
    trouty

    trouty Finding my (electric) wheels

    Joined:
    Nov 4, 2016
    Messages:
    87
    Likes Received:
    93
    Location:
    west yorkshire BD20
    Yes can do it gets new leds , new driver , new switch .
    Did about 500 of the buggers a few years ago.
    Charged £70 each at the time. Including return postage .
    But it became uneconomical when the cheap Chinese stuff flooded the market

    The leds driver and switch cost £30
    So I made £35 profit after posting back .
     
  8.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    http://www.ebay.co.uk/itm/Cree-XHP7...hash=item238d480fcb:m:mes0mtYPItMcBUh8EyRr09g
     
  9.  
    trouty

    trouty Finding my (electric) wheels

    Joined:
    Nov 4, 2016
    Messages:
    87
    Likes Received:
    93
    Location:
    west yorkshire BD20
    And that soundwave is why Troutielights stopped trading .

    Much kudos to you for sticking with the diy route I still make a few lights and dabble with new leds now and again .

    But since the xpg s arrived on the scene. The newer stuff like your 70 is too flood and needs a huge reflector to send the lumens down the trail and each new led while it produces good lumen counts becomes harder to find good optics or reflectors .

    I have loads of. XPE , XPG . XML and the newer variant leds in my spares bins
    Plus quite a few different driver boards from www.taskled.com
    And do enjoy messing with them .

    My current helmet light outputs approx 4000 lumens and will send those rays well over 400 mtrs down the trail on full power .
    Which is only used for laughs

    It’s the bottom one
    41128E16-DF7D-4844-8671-2BCE3060AEE6.jpeg

    spider eyes. And Liberator. Are the other two.
     
    • Like Like x 1
  10.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    you got a driver that is 12v to the led kicking about? or a link to one.

    also not much out there to diy a bike light as lack of hosts and reflectors.
     
  11.  
    trouty

    trouty Finding my (electric) wheels

    Joined:
    Nov 4, 2016
    Messages:
    87
    Likes Received:
    93
    Location:
    west yorkshire BD20
    What’s your input voltage And how many amps do you need
     
  12.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    DSC_0663_01.JPG
    12v 2.4a tho i think i should of got the 6v ones as lot less hassle for a batt to run them form as buck converter not much use on a bike lol.
     
  13.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    DSC_0617_02.JPG
     
  14.  
    LeighPing

    LeighPing Pedelecer

    Joined:
    Mar 27, 2016
    Messages:
    2,018
    Likes Received:
    883
    Location:
    The Red Ditch
    Bang for buck, it's not a bad light. In that rainy, well street-lit video it's hard to judge it's effectiveness. Here's a mix of well lit urban, dark lanes, woods and fields that show it's output a bit better.

     
  15.  
    Gubbins

    Gubbins Pedelecer

    Joined:
    Mar 14, 2014
    Messages:
    3,530
    Likes Received:
    1,128
    Location:
    North UK where men are men and Sheep are Nervous
    Tried mine tonight and seems ok, does what I expected, but as with all vids of lights they are much brighter in real life.


    Oh, and one for SW..
     
    • Agree Agree x 1
  16.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    • Like Like x 1
  17.  
    Gubbins

    Gubbins Pedelecer

    Joined:
    Mar 14, 2014
    Messages:
    3,530
    Likes Received:
    1,128
    Location:
    North UK where men are men and Sheep are Nervous
    • Agree Agree x 1
  18.  
    soundwave

    soundwave Pedelecer

    Joined:
    May 23, 2015
    Messages:
    6,154
    Likes Received:
    1,330
    • Agree Agree x 1
  19.  
    MikelBikel

    MikelBikel Finding my (electric) wheels

    Joined:
    Jun 6, 2017
    Messages:
    70
    Likes Received:
    9
    Location:
    Ireland
  20.  
    Gubbins

    Gubbins Pedelecer

    Joined:
    Mar 14, 2014
    Messages:
    3,530
    Likes Received:
    1,128
    Location:
    North UK where men are men and Sheep are Nervous
    Spelling?
     

Share This Page