Here is the report. I will get the html version up in the test file
Black Diamond Cosmo Headlamp
Field Report - August 1, 2006
Name: David Heyting
Height: 6' 0", 1.83 m
Weight: 205 lb, 93 kg
City, State, Country: Snoqualmie, Washington, USA
I have been hiking and backpacking for over 15 years. A great deal
of the backpacking that I do is related to mountaineering and rock
climbing in the Pacific Northwest. When not climbing, I'm a hiker
that tries to go light to be able to push more miles. My main areas
of exploration are the Washington Central and North Cascades.
However I have also done lots of hiking in the British Columbia
Coastal Range as well as the Oregon Cascades. I am also an avid
adventure racer and compete in several races each year ranging from
2 hours up to 24 hours in duration.
Manufacturer: Black Diamond
Listed Weight: 2.8 oz/ 80 g with batteries 1.6 oz/ 44 g without
Tested Weight: 2.9 oz/ 82 g with batteries 1.7 oz/ 48 g without
MSRP: $29.95 US
Country of Manufacturer: USA
Date Received: 05 17 06
The Cosmo is a compact and lightweight headlamp that features four
SuperBright LEDs that provide bright close range lighting. For more
information please see my Initial report.
I have been able to use the Cosmo in a variety of different terrains
over the past two months while being able to test the functions of
the Cosmo in a variety of different uses from nighttime glacier
climbing, to orienteering and finally to camp life. During this
period I was able to test the headlamp at elevations ranging from
sea level to over 14,000 ft (4,267 m). While climbing Mt. Rainier in
Washington, I used the Cosmo as my main light source while leading
my rope team to the summit. I also used headlamp while making an
alpine start, climbing in the Mt. Zirkel Wilderness, which is near
Steamboat Springs, in the Colorado Rockies. I also used the
headlamp while doing multiple nighttime orienteering and trail
running practice in the Central Cascades. The headlamp also served
as my camp light while camping in dry climate of Eastern Oregon.
The temperatures during my testing ranged from 40 degrees up to 95
degrees (4 c to 35 c). I had hoped that the temperature during my
Mt. Rainier climb would allow me to test the headlamp at some colder
conditions; however the weather was extremely warm during that
The Cosmo has preformed wonderfully and has been able to provide a
steady lightweight source of light.
In testing the Cosmo I wanted to be able to push its limits by not
only taking the headlamp into various terrains and elevations, but
also to use the headlamp in a variety of uses. During my testing I
found the Cosmo to be lightweight and comfortable to wear. I also
found that it was easy to attach to my climbing helmet. The on/off
button was easy to use, even with gloves on. I was also easy to
adjust the direction of the light by tilting the headlamp. This was
easy to do on the fly, with or without gloves on. The Cosmo
provides a great light. I was impressed by the way the headlamp was
able to light up the peripheral while still maintaining a solid
straight beam with which to see. This made it easy to trail run and
navigate with as the Cosmo provided great lighting around my feet.
A couple times I did wish the Cosmo could emit a focused beam
straight ahead to see a little bit further in the distance. The
Cosmo does a great job of lighting up the tent or a wilderness
restroom for that matter. During the testing, I found myself mainly
using the brightest light during the testing as I never really had
the need to use the other setting. I had the light on continually
for well over 20 hours during my testing and I did not notice any
reduction of light output during the two months. I did find myself
really enjoying the weight and size of the Cosmo as during the past
two months, I have taken the Cosmo on all trips (even day trips) as
part of my survival gear.
For my test plan I outlined five main factors to review as well as
looking at how field conditions and activity choice affected the
function of the Cosmo.
Here are the five factors and the results:
1. Visibility How much light does the light actually put out?
The Cosmo provided great lighting for each activity that I did. I
felt that the light provided great side lighting, without
sacrificing very much in terms of straight ahead focused beam
power. Which was great for the camp site or while trail running.
2. Best intended use Under what conditions does the Cosmo
I felt the Cosmo excelled in all conditions that I was in as well as
in each activity that I performed. I used the Cosmo for camp life,
glacier climbing, trail running, and orienteering. I felt the Cosmo
functioned well for each discipline and is a very well rounded
3. Burn Time How long do the batteries last?
Currently I am at over 20 hours and the Cosmo has shown no
noticeable drop in power.
4. Ease of use Is the headlamp easy to use in all conditions?
The single switch button was simple to use and easy to access even
with gloves on. With only one strap to adjust to change the length
of the headband, I found it easy to adjust the size to move from my
head on to my climbing helmet.
5. Comfort Is the headlamp comfortable over a long period?
I thought the headlamp rode quite well. I used the headlamp,
directly on my head, with a baseball hat on and with a climbing
helmet and felt the Cosmo was comfortable in each case.
I felt the Cosmo performed well over all activities that I performed
during the past two months. As far as conditions go, the Cosmo
performed well in all cases. I felt I was able to provide a good
test of performance at elevations with my trips to Mt. Rainier and
the Colorado Rockies. In all cases elevation seemed to have no
impact on the Cosmo. As far as weather condition go, I experienced
great weather during my test hot weather did not seem to have any
impact on the Cosmo. However, I did not have the opportunity to
test the Cosmo in either extreme cold or in a rainy atmosphere,
which I would like to do.
Thanks to Black Diamond and BackpackGearTest for the opportunity to
test the Cosmo.