On 22/01/2018 12:36 PM, AMuzi wrote:
On 1/22/2018 11:13 AM, Frank Krygowski wrote:
On 1/22/2018 12:04 PM, Jeff Liebermann wrote:

Since you mention hub powered lights, how many lumens
would you
estimate (or calculate) that your dynohub can deliver?
(Yes, I know
that the brightest light is not always the best light).
The hub
nominally produces about 3 watts of power:
http://www.peterwhitecycles.com/Shimano3N70.php
Assuming 100% conversion efficiency from hubs AC output to
whatever
current source powers the LED(s), and assuming 100
lumens/watt LED
efficacy including the lens and reflector losses, the most
that could
be delivered is:
Â*Â* 100 lumens/watt * 3 wattsÂ* = 300 lumens
I won't pass judgement on whether 300 lumens is adequate
for every
possible style of night time cycling, but personally, I
would like to
have some more lumens even if I don't use them.

Does that apply to other aspects of bicycle technology?

"I don't know if 48 spokes are adequate for every bicycle
wheel, but personally, I would like to have more than 48
spokes per wheel even if I never need them."

Most high-end bike headlights are like 62 spoke wheels. How
do you fit 62 spokes into a wheel? Well, you run a bunch of
extra spokes from one spot on the rim to another spot on the
rim. Sure, they're going in a direction that's totally
useless, but it's still better, because, like, it's MORE!

Just like lumens.



72 spoked wheel is a product:
http://www.statussuspension.com/lowr...h-76-35-1.html






Ya'll got that backwards. More ain't always better. Less spokes are
better!

https://www.ebay.com/itm/HED-3-TRI-S...-/282683418685