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Instructions for optimal bike lights.

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Road Cycling
Published
11 February 2008
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12 February 2008
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fjs
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  1. One of our advocacy group members is an electrical engineer and
    bicycle commuter. He's taught several seminars on bike lighting
    systems and has designed his own, directions provided in this pdf.
    http://wbwc.org/bikelighting-workshop/BikeLighting-workshop.pdf.
    Night cycling on busy roads is inherently dangerous, but visibility
    helps your chances. I've seen this guy approach me from over a mile
    away in daylight! The headlight is bright as a motorcycle and the
    tail light is ... well .. I've followed him on night rides and it
    obscures my vision.

    Check out this link! And while you're at it, check out the WBWC
    website itself, a great source of bicycle/pedestrian information for
    SE Michigan.

  2. fjs said:

    One of our advocacy group members is an electrical engineer and
    bicycle commuter. He's taught several seminars on bike lighting
    systems and has designed his own, directions provided in this pdf.http://wbwc.org/bikelighting-workshop/BikeLighting-workshop.pdf.
    Night cycling on busy roads is inherently dangerous, but visibility
    helps your chances. I've seen this guy approach me from over a mile
    away in daylight! The headlight is bright as a motorcycle and the
    tail light is ... well .. I've followed him on night rides and it
    obscures my vision.

    Motorcycle headlights are suitable for 70 mph. Why on earth would an
    ordinary bicyclist need that?

    Quoted message said:


    Check out this link! And while you're at it, check out the WBWC
    website itself, a great source of bicycle/pedestrian information for
    SE Michigan.

    We've seen this stuff before.

    I don't believe night cycling on busy roads is "inherently dangerous"
    if a person has standard, legal bike lights. I've not seen evidence
    of that, and I've done lots of reading on this subject, and _plenty_
    of such riding.

    I've also done seminars and workshops on bicycle lighting. One of the
    activities has been to take bike club members out and let each rider
    observe and critique his own bike's lighting system from the viewpoint
    of a motorist. The overwhelming results of these tests were that one
    does _not_ need taillights so bright they obscure others' vision, nor
    headlights so unfocused and powerful that four pound batteries are
    necessary. A properly lit and reflectorized bicycle is easily
    noticed, even in environments with lots of other lights. It's even
    more easily noticed in country-road darkness.

    Cycling at night with no lights or reflectors is certainly more
    dangerous than riding in daylight. But it takes relatively little in
    the way of lights and reflectors to make a nighttime cyclist much more
    conspicuous than a daytime cyclist. Countless cyclists around the
    world know this, and ride safely with very ordinary systems. Only in
    non-biking America is the fearmongering and lumen overkill considered
    necessary.

    - Frank Krygowski

  3. fjs said:

    Check out this link!  And while you're at it, check out the WBWC
    website itself, a great source of bicycle/pedestrian information for
    SE Michigan.

    He invokes Steve Scharf's website, which makes his opinions
    automatically suspect, in my opinion.

  4. On Feb 11, 10:32 am, [email hidden] wrote:
    ....

    Quoted message said:

    Motorcycle headlights are suitable for 70 mph. Why on earth would an
    ordinary bicyclist need that?
    ...
    - Frank Krygowski

    I'm certainly down with most of what yer saying Frank. If I thought it
    was dangerous, like eating raw lettuce from a fast food joint, I
    wouldn't do it.

    BUT,
    the deal with wanting your lights to be as bright as the motor
    vehicles around makes sense, you want other road users... read morons
    with motors, to perceive you as another vehicle, not stationary
    illumination like the strobe light in the dry-cleaners window that
    flashes long after closing time. I like it bright. The lights on
    your bike, no matter how bright they are, couldn't be too bright as
    the motorist you share the road with aren't. And your light must
    overcome their dimness. Even when you're not in the high traffic areas
    a big circle of light on the pavement in front of you improves your
    visibility from the rear, just like lighting up the bumper in front of
    you does in traffic. I got myself a tail light or two just the same
    tho.

    But unlike most of the people that are telling you that your lights
    should be brighter I ain't trying to sell ya anything. Be bright but
    be thrifty too. You've already got a 3 or 4 cell mag lite (or so I
    would bet), a little foam & old inner tube ought to fix that to yer
    bars pretty securely and come off easily - Go for the Luxon LED
    upgrade though - it will be brighter than most of the sub $100 lights
    at the bike store. If your boss subsidies your battery expense it's
    all the better to use D-cells.

    What I've done for the last several years is to carry a "running
    lamp"... you know like a fog lamp, only with a slightly narrower
    focus. I bought it at the auto parts store, but don't get your
    battery there, get a deep cycle 12V number (look over by the deer
    feeders), then you can use a regular 1 amp tickle charger to juice it
    up. Make sure that the battery is big enough that you don't burn
    more than about 60% of it on your regular trip. You ain't gotta be an
    E-squared to figure it out - just divide the watts by the volts and
    thats how many amps it will draw. You can use any bulb on the self,
    but the kit contains a lens too... and you do want your light focused
    a bit more that just sticking it in the back of a polished juice can
    provides. Although, like most things if you throw way more power at
    it you can probably overcome a lack of finesse.

    Mine is a 36W halogen, I've had people comment to me that they didn't
    know what the $#% i was when they saw me from a distance... (but they
    did see me from a distance - so I win). One gal told me she thought a
    I was a motorcycle, so she waited to pull out in front of me... but as
    she was waiting for me to go by it dawned on her that I was going
    really slow, but she still didn't pull out because she wanted to wait
    and find out what I was. Being an unidentified rolling object is
    better than being immediately identified as something squishy that
    might not even scratch the paint. At night people think I may be a
    tractor and give me way more room than they do when they see that I am
    mostly flesh and less metal than is in one of their seats.

  5. fjs said:

    http://wbwc.org/bikelighting-workshop/BikeLighting-workshop.pdf.

    He suggests using a motorcycle driving light head from JC Whitney. I
    built a home brew light around the same light and really discourage
    others from doing the same. I found it to be of very poor quality and
    was unhappy with the results. I had to drill a hole in the housing to
    put in a setscrew since the face kept falling off, I had to put head
    shrink tubing over the wires where they come out since it was so sharp
    and they were shorting right away, then a few weeks later the head
    started vibrating around since the rivet was too soft and no longer
    holds it on well. Overall, very disappointing.

  6. DennisTheBald said:


    the deal with wanting your lights to be as bright as the motor
    vehicles around makes sense, you want other road users... read morons
    with motors, to perceive you as another vehicle, not stationary
    illumination like the strobe light in the dry-cleaners window that
    flashes long after closing time.

    Sorry, but I've never seen evidence suggesting that level of
    brightness is needed. Trust me, I've looked. Again, the tests I've
    run with groups of our club cyclists show that "normal" bike lights
    are fine.

    If you have evidence normal bike lights are inadequate, I'd like to
    see a citation.

    Quoted message said:

    Mine is a 36W halogen, I've had people comment to me that they didn't
    know what the $#% i was when they saw me from a distance... (but they
    did see me from a distance - so I win).

    :-) Mine is a 3 watt halogen, and I've also had people make favorable
    comments to me. My favorite two are "What's that really bright light
    down by your rear axle?" (It was a reflector), and "Your lights are
    great. I could see you from half a mile back there."

    Quoted message said:

    One gal told me she thought a
    I was a motorcycle, so she waited to pull out in front of me... but as
    she was waiting for me to go by it dawned on her that I was going
    really slow, but she still didn't pull out because she wanted to wait
    and find out what I was.

    Yep - and I've had many motorists do the same, that is, wait a _very_
    long time for me to pass, rather than turn left in front of me.

    I don't recall a motorist ever pulling out in front of me at night.
    I've had it happen in daytime, though. From that - and everything
    else I've checked - I know I'm more conspicuous at night than I am in
    daylight. And that's good enough for me.

    Remember, people all over the world ride bikes using only generator
    lights and reflectors. I'm talking about people who routinely commute
    by bike, or people who ride multi-hundred-mile, all-night Audax or
    randonneuring rides. I think these folks probably know more about
    what works than the typical delicate American "fast recreational
    rider" does.

    - Frank Krygowski

  7. aka Frank Krygowski said:

    [...]
    I don't recall a motorist ever pulling out in front of me at night.
    I've had it happen in daytime, though. From that - and everything
    else I've checked - I know I'm more conspicuous at night than I am in
    daylight. And that's good enough for me.[...]

    More likely is that the cagers do not know what you are at night. When
    the cagers see a bicycle in daytime, they often pull out because either
    they can not imagine you are going faster than 8 mph, or their skulls
    are full of fecal matter and they deliberately cut you off.

    --
    Tom Sherman - Holstein-Friesland Bovinia
    The weather is here, wish you were beautiful

  8. fjs said:

    One of our advocacy group members is an electrical engineer and
    bicycle commuter. He's taught several seminars on bike lighting
    systems and has designed his own, directions provided in this pdf.
    http://wbwc.org/bikelighting-workshop/BikeLighting-workshop.pdf.
    Night cycling on busy roads is inherently dangerous, but visibility
    helps your chances. I've seen this guy approach me from over a mile
    away in daylight! The headlight is bright as a motorcycle and the
    tail light is ... well .. I've followed him on night rides and it
    obscures my vision.

    Check out this link! And while you're at it, check out the WBWC
    website itself, a great source of bicycle/pedestrian information for
    SE Michigan.

    LOL, at least he referenced my site, since he took a lot of the
    information in his presentation from it!

    Personally I now tend to use the sealed halogen beams because they have
    a bigger reflector and you can get by with only the 14 watt headlamp, or
    have one 25W and one 14W.

  9. "fjs" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    One of our advocacy group members is an electrical engineer and
    bicycle commuter. He's taught several seminars on bike lighting
    systems and has designed his own, directions provided in this pdf.
    http://wbwc.org/bikelighting-workshop/BikeLighting-workshop.pdf.
    Night cycling on busy roads is inherently dangerous, but visibility
    helps your chances. I've seen this guy approach me from over a mile
    away in daylight! The headlight is bright as a motorcycle and the
    tail light is ... well .. I've followed him on night rides and it
    obscures my vision.

    Check out this link! And while you're at it, check out the WBWC
    website itself, a great source of bicycle/pedestrian information for
    SE Michigan.

    after much study i can to teh conclusion that the best night time item to
    sue is on your back the triangular sign that construction vehicles use-- i
    have sewed fluroescent bads on all my bike clothing similar to what is used
    by miners ( red white red)

    fwiw

    peter

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