01-03-2007, 07:32 AM
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#6 (permalink)
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| | Re: What's the brightest dynamo light?
I have the newer SON & 2 of the new Shimano generator hubs. (DH-3d71
DH-3n71)
SON on a 650 roadie wheel, 1 on a 26" mtb wheel, 1 on a 700c roadie
wheel.
They put out a simliar amount of power. The shimano is reported to
have a little more drag but I can't tell when riding. The total drag
is pretty much unnoticiable. Consider the electric 'drag' is 3 watts,
plus maybe 1 or 2 more watts for losses. Compare that to the 100+
watts you are putting out a a slow riding speed. Racing watts could
approach 500. 3 watts is pretty minor.
the headlight light is what matters.
I have the Shimano LPR 600? , I don't recommend it. The beam is way
too dispersed, it has a second white led that flickers a low speeds
within your vield of view and gets brighter as you increase speed. The
lense wraps around the top and transmits more light into your field of
view. This destroys your night vision.
Generator lights need a voltage regulator (Zenor diode) to prevent
burning out the bulb at higher speeds. So you can use any light if you
add the diode. Generator specific headlights have those diodes built
in.
the big advantage of a generator is it always works. No dead batteries
miles from home.
The down side is no light at the stop lights/signs. Add a small white
flashing led to the handle bars for in town visability.
Rick
Tom Schmitz wrote:
> Gooserider wrote:
> > I currently use a DiNotte Ultralight, which is a super light. It's bright
> > and well designed. I would like to try a dynamo hub on my next bike, and I
> > don't know what the hot light setup is. I would not have a problem running
> > two dynamo headlights, as I want the most light I can get. The Shimano
> > dynohub would be my choice. I know the Schmidt SON is awesome, but it's also
> > three hundred bucks, which is three times the Shimano. So, what light(s)
> > shouId I choose to get the most light?
> >
> > Mike
> >
> >
> Hi -
>
> I like the BiSy lamps. They have a nice rectangular pattern that is
> brighter at the top, which help a bit with the long range.
>
> I have two mounted on the front of my commuter bike - see here:
>
> http://www.flickr.com/photos/34424013@N00/343394431/
> http://www.flickr.com/photos/34424013@N00/343394427/
>
> One is used as a main beam, the other as a high beam by focusing it a
> bit further down the road.
>
> While I take credit for the construction, I shamelessly stole the design
> from Tim McNamara.
>
> Regards,
>
> Tom
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