I know of at least 4 different bike lists that Alex posts to on a regular basis. I also know that Alex is really good at his "real" job (we sort of work together). And watching his
blog, it's clear the guy gets a lot of other stuff done. There's also other non-bike related interests that Alex spends time pursuing (electronics, computer stuff, fish stuff, beer making, home projects, etc). It's not clear to me how he does all this. But some common Alex traits thread their way through all of these pursuits: honesty, curiosity, and creativity.
Anyway, that's the Alex backstory.
The following was taken from a thread on a bike list at work. Some guy posted the chart below and then below that is Alex's reply.
I found it particularly enlightening. Or should I say illuminating? (I've been watching too many Hitchcock intros).
Brand/Model | Price | Claimed Lumens | Measured Lux | $ per lux |
Ayup 2010 bar V4 Adventure System (Full Review here) | $233 | 400 | 34 | $6.85 |
Ayup 2010 helmet (Full Review here | $233 | 400 | 31 | $7.52 |
Baja Designs Stryker | $298 | 700 | 52 | $5.73 |
Exposure Toro (Full Review here) | $339 | 700 | 36 | $9.42 |
Exposure Diablo (Full Review here) | $249 | 700 | 34 |
$7.32 |
Exposure MaxxD | $399 | 960 | 48 | $8.31 |
HID Technologies Lumen8r Quad | $495 | 1000 | 6 | $8.25 |
Lupine Tesla 4 (Full Review here) |
$420 | 700 | 52 | $8.08 |
Lupine Wilma 5 | $459 | 920 | 66 | $6.95 |
Lupine Betty | $1,019 | 1750 | 165 | $6.1 |
Magicshine MJ-808 (Full Review here) | $85 | 90 | 37 | $2.30 |
Niteflux Enduro 8 Single | $249 | 540 |
|
|
NiteFlux Max Extreme 2 | $480 | 1350 | 70 | $6.86 |
Niterider Pro 600 | $499 | 600 | 46 | $10.85 |
Niterider Pro 1200 | $649 | 1200 | 82 | $7.91 |
TrailLED Darkstar | $420 | 1200 | 81 | $5.19 |
Says Alex:
This chart shows while Lumens are such a silly way to measure lighting.
Lux is the intensity of the light over an area. Lumens are the total intensity of the light. You can have something with very high lumens distributed over thousands of square meters and the light wouldn't be noticable at all (so the lux would be very low). The same number of lumens could be concentrated into in one square mm and probably burn a hole through something (the lux would be very very high).
The headlight that I use (a generator headlight called the IQ Cyo) is 60 Lux, but uses a LED that only puts out around 150 lumens (CREE XR-E). The lenses just do a good job of putting the light on the ground in front of the cyclist, and not wasting it lighting up trees that are over the road or trail. The MS has 6x the number of lumens, but puts less light onto the ground becuase the light is being distributed everywhere. A lot of that scattered light is going into the eyes of oncoming cyclists and driver's, blinding them.