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Old September 12th 17, 11:50 AM posted to rec.bicycles.tech
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Default Is there an updated Dynotest somewhere?

On 9/11/2017 11:59 PM, Sepp Ruf wrote:

snip

For Rob who might experience mental drag uphill from just having to see a
big, heavy, non-laminated hub slowly revolving in the front wheel, the
smallish Shimano DH-T780-1N, 1.5W 250mA class, might suffice[1] once he
grows sick of the Soubitez. Best price I see is 96 euros a pair from CNC
Hamburg on ebay, no overseas shipping available, though.
http://www.ebay.com/itm/253093811841

[1]
DRL does not require more than 100 lumens if you get the optics right.


True, but if you want a dynamo light for more than just a DRL then that
won't do.

I have an SP dynamo (relabeled as "Joule") on a 20" wheel on a Dahon.
It's coupled to a European dynamo light with about the best optics
available, but at a claimed 200 lumens it's still really only useful as
a DRL, plus it does not have a flash function.

The SP PV-8 claims 72% efficiency. SON claims 65%. I don't think either
company is going to spend much trying to improve that number given the
way the bicycle lighting market is going. Even at perfect efficiency
you;re not going to be able to run even a mid-range 1000 lumen light,
let alone the 2500+ lumen lights that bicycle commuters require.

I am going to Interbike next week and I'll see what new lighting
products are available. But Interbike is shrinking with a lot of
companies pulling out. Next year it's in Reno instead of Las Vegas, and
it will shrink even more since Reno is not as convenient and cheap to
get to, and in a few years it will go the way of Comdex.
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