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Old December 4th 17, 05:51 PM posted to rec.bicycles.tech
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Default New B&M 100lux headlight.

On 12/2/2017 8:02 PM, Oculus Lights wrote:
On Tuesday, November 21, 2017 at 2:34:34 PM UTC-8, James wrote:
https://www.bike24.com/p2144878.html

--
JS


B&M plays the lux only racket. But their lights are poor lumens/lux ratio. Lux only says the intensity at the brightest point anywhere in the beam. No mention if this is STVZO or not. Best guess is that it isn't. My STVZO working concept is more efficient than any STVZO beam currently on the market. It would need 18 watts for 100lux STVZO, and even that would probably not be able to stay under 2 lux on the horizon. ~65 lux at ~9 watts making 650+ lumens is about the ceiling for a single LED STVZO compliant light.


B&M could buy an integrating sphere and specify both lumens and lux. For
obvious reasons they choose not to do so.

The reports I've seen from users trying to estimate lumens on the B&M
are a lot less than 650 lumens.

I see most higher power lights now moving to multiple LEDs. I had one
high power flashlight where the single LED got so hot that it unsoldered
itself from the PC board. Similar to the problem that some laptops had
with their graphics chips a while back.
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