On Fri, 16 Feb 2018 15:13:29 -0500, Frank Krygowski
wrote:

On 2/16/2018 12:33 PM, sms wrote:
On 2/16/2018 9:03 AM, jbeattie wrote:
On Friday, February 16, 2018 at 7:49:50 AM UTC-8, Joerg wrote:
On 2018-02-15 12:16, sms wrote:
On 2/15/2018 9:35 AM, Joerg wrote:

snip
************************************************** * ... Of course
we will soon see claims that this is all self-interest by Trek, whose
sole aim is to sell more lights.


Everybody should know that such articles aren't very suited to foster
sales of their own products but lights in general.

True. But it's a convenient excuse to dismiss the findings of such
article. Even though Trek is not a major supplier of bicycle lights,
you
can already predict the narrative that will spew forth. You saw it
already with the Odense study.


Yep, afterwards the usual denialist stuff roll in.

Any study showing that a little mag-dyno blinky decreased daytime solo
accidents by 27% is suspicious on its face. If that doesn't raise an
eye-brow, you don't have eye-brows.

I think, that as a lawyer, you likely understand that the fact that the
DRL is powered by a magnetic dynamo is irrelevant in terms of its
effectiveness.

The "magnetic dynamo" is one or two isolated magnets attached to the
spokes and passing a coil built into the light. You get either one or
two tiny pulses of electricity per wheel revolution. It's like a 4th
grade science fair project.

It can't possibly put out anywhere near the power of a real bike dynamo.
Yet you're the person who has spent years claiming that real bike
dynamos are completely insufficient.

Are you getting a commission on these things too?

A strange thing about the Reelight Study. The numbers appear to be
variables. In Reelight's documentation
https://www.reelight.com/pages/bike-safety

The lights "Reelight has proven that our induction lights reduce the
probability of accidents [...] by 47%* for accident with more than one
involved party.

Yet in another description, by a non Reelight source it states, "which
documented a 32 % decrease in the amount of bike accidents when fixed
mounted magnetic bike lights were used."
http://www.cycling-embassy.dk/2010/09/29/reelight-3/


In the earliest reports I was able to find on the study the results
were stated to have been " The experiment resulted in a change in the
law in Denmark, flashing lights are now legal."

A study that, depending on where reported, varies by some 32% in
effectiveness, does not seem like a very authoritative source.

But accuracy aside both of the reports quoted above stated that
"Furthermore, 85%* of our induction light users have expressed to have
felt safer whilst riding in traffic.", which I believe is true, and is
exactly what the two most prominent California DRL adherents are
saying.... that with bright DRL's they feel safer.

Unfortunately feeling safe and being safe are not necessarily based on
the same conditions.

--
Cheers,

John B.