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Old December 6th 17, 06:35 AM posted to rec.bicycles.tech
James[_8_]
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Posts: 6,153
Default New B&M 100lux headlight.

On 04/12/17 11:28, Oculus Lights wrote:
On Tuesday, November 21, 2017 at 2:34:34 PM UTC-8, James wrote:
https://www.bike24.com/p2144878.html



Is there a power rating?


One can safely assume it will work with any normal 6V/3W dynamo.

100 lux at 10 meters, as the STVZO test requires, is exceedingly
bright. I'm hesitant to state they "must" be drawing at least so
much power, but my gut feeling is that its in a range that a single
LED can't handle.


Depends on how the light is focused.

Anyone can rate a light without stating the distance. My single LED
325 lumen measures 33 lux at 10, 500+ lumen measures 50 lux, and the
best of the others on the market, such as Supernova's 205 lm that's
standard equipment on many e-bikes, measure 25 lux at 10 meters, at
most.


My B&M IQTec Premium is rated at 80lux. It also works with a 6V/3W dynamo.

The light is focused to a very bright band just before the cut off, so
that you can aim the light well in to the distance and achieve a
relatively even illumination of the road surface over the entire distance.

If yours is only reaching 33 lux, it is less well focused and more of a
flood light.

See images here.
http://www.bentrideronline.com/messa...d.php?t=131473

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JS
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