Test Application - Princeton Tec EOS Headlamp - Chuck Carnes
- Princeton Tec EOS Headlamp Test Application
Please review and accept my application to test the
Princeton Tec EOS Headlamp.
I have read the Survival guide 1202 and in particular
chapter 5 and agree to follow all guidelines within.
Name: Chuck Carnes
Height: 6�0� (1.83 m)
Weight: 175 lbs. (79 kg)
Email address: ctcarnes1@...
City, State, Country: Taylors, S.C. United States
Date: November 31, 2004
I love the outdoors � I�ve spent time camping in the
outdoors since I was born, and have been actively
hiking and backpacking for the past ten years. I
consider myself a lightweight hiker, usually carrying
20 � 30 pounds (11-13 kg) for hikes up to a week in
length. I hike at an easy pace, averaging 2 mph (3
kph). I am a one man tent camper for now until
something I like better comes along. I like to carry a
single trekking pole when I hike to help relieve
stress to my legs and knees. I like to get out on the
trail as often as I can.
I plan to test the Princeton Tec EOS Headlamp on
several different planed and spur of the moment
backpacking trips throughout this test. I will be
backpacking in the Smokey Mountains and Pisgah
National Forest thought the Winter of �04 and Spring
of �05. The elevation is about 6643 ft (2025 m) in the
Smoky Mountains and at Pisgah, the elevation will be
around 6200 ft (1890 m). The temperatures during the
time of testing will be 40F to 50F (4C to 10C) during
the day and 10F to 30F (-12 to -1C) at night,
sometimes below zero. I will note weather conditions
at the time of testing.
I currently use a headlamp during the night in camp
such as cutting wood, reading and eating. I also use a
head lamp during trail hiking and those middle of the
night bathroom excursions.
If I am accepted and given the privilege, I intend to
test the Princeton Tec EOS Headlamp for its durability
during everyday camp use. Most, if not all, of the
following scenarios will be taken place at night or in
As a long term test I will see if the headlamp is
durable enough to withstand the constant bumping and
dropping that sometimes takes place during camp set up
and take down. I will test the lamp for stability and
accuracy of the beam while cutting firewood, cooking,
reading, hiking and other various tasks. Site
distances will be tested and noted at various settings
and declination if applicable. The web site picture
shows and states one bulb; will this one bulb be
bright enough? The web site says that as long as the
batteries have sufficient voltage, the light will
remain at a constant brightness. Is the decrease in
brightness quick and noticeable or is it very slow to
give me time to change the batteries before I am
sitting in the dark? How easy is it to change the bulb
and batteries? Do I need a tool to access the bulb and
battery compartment? Does it have an extra bulb? If
not, can I find one at most stores that carry bulbs or
are they hard to find? I will keep an estimated time
log on the life of the batteries and bulbs. With the
simple design and construction of the headlamp, how
compact can it get to be placed in a backpack or
Comfort, to me, is very important when it comes to
headlamps. I usually wear a baseball cap while hiking
or at camp. Can I wear the baseball cap and the light
on the headband together? If a hat can be worn, does
the brim of the hat affect the declination of the
light beam? I would also like to see if I am able to
use one hand to operate the headlamp, such as turning
it on and off and adjusting, while on the headband.
Since the headband has no over-the-head strap, will
the headlamp have a tendency to slide down during
walks? How comfortable is the headlamp on the forehead
for an extended length of time? Does the headlamp feel
front heavy or is it comfortable and light enough to
Waterproof tests will be performed in the field if
cases of rain occur. If accidents of dropping the
headlamp in a river or lake has not occurred by the
end of the review, I will submerge the headlamp in
water to test the effects if this happening in the
field. Does the light still work? Does water get into
the bulb compartment? Will it short out or become dim?
If and when the headlamp is to be cleaned, how easy is
it to disassemble to perform this task? Is there a
waterproof seal that is not to be broken?
Other various tests will be recorded in my reviews as
they occur. Weight and specifications of the headlamp
upon arrival will be reviewed, commented and recorded.
I would really appreciate the opportunity to test and
review the Princeton Tech Scout Headlamp. Again, if
given the opportunity to test this headlamp, I will
give it a complete and honest review. Thank you for
Test that I have recently been chosen for:
Wookey Phoenix Backpack (has not arrived)
OR Celestial Gaiters (has not arrived)
OR Motion Fleece Balaclava
Currently Monitor for:
Henry Shires Tarptent Cloudburst
Currently a Mentor for:
Princeton Tec Scout Headlamp
Xikar 138 Excel Knife
OR Hydrolite Stuff Sack
Paxtons Sandle Saver
Big Agnes Hog Park Sleeping Bag
Big Agnes REM Hinman Sleeping Pad
Big Agnes Seedhouse 3 Tent
Macabi Skirt for Men
Frogg Toggs Pro Sport Suit
Owner Reviews Uploaded:
Gregory Lassen Backpack
Mountain Hardware Nickel Cigar Sleeping Bag
Coleman Camp Stool
Moonstone Rain Jacket
2 Previously Written Reviews:
Macabi Skirt for Men:
Frogg Toggs Pro Sport Suit:
Other Reviews and Reports By Chuck Carnes:
Do you Yahoo!?
The all-new My Yahoo! - What will yours do?
- Application to test the Princeton Tec EOS Headlamp
I have read and understood the current requirements in the Survival Guide
(version v. 1202 as of 09/10/04) and I agree to comply with all these
requirements as a tester. I also have a signed tester agreement on file.
51 years old
6 ft 1 inches tall (1.85 meters)
215 lb (98 kg)
erd <at> wilsey.net
Catskill Region, New York State
I enjoy walking in all its manifold forms, from a simple stroll in the
woods to multi-day backpack excursions. Though by no means an extreme
ultralight enthusiast, from spring to fall my preference is to carry a
packweight of 12 lb (5.5 kg), more or less. In recent years, I've
rapidly moved to a philosophy of "lighter is better," within the
constraints of budget and common sense.
Testing locations and conditions.
Catskills, Adirondacks, possibly the White Mountains and the
mid-Hudson valley region, from early winter to late spring. In the
Catskills and Adirondacks, I expect to be out and about in
temperatures down to -15 F (-26 C); in the Whites, possibly lower.
Upper temperatures during the testing period could run as high as 70 F
(21 C), during the latter portion of the test period.
Similar lamps used
Black Diamond Zenix
Black Diamond Ion
Princeton Tech Vortec
I've been fascinated to observe the rapid adoption of LED technology
in headlamp manufacture. All three headlamps I own are now LED (the
Princeton Vortec has an aftermarket LED bulb). The light intensity
from a single LED is now sufficient for almost all situations that one
is likely to encounter on trail. LED lamps offer huge advantages over
conventional bulbs, in that they are far more energy-efficient (much
of the energy supplied to a conventional bulb is dissipated as heat)
and are far less likely to be affected by impactthere's a very low
likelihood of breaking an LED "bulb" if the headlamp is dropped.
What has been lacking in many low-end headlamp models is voltage
control, important for long hikes, particularly in cold weather when
the rate of power depletion in conventional alkaline batteries is
accelerated. It can be very frustrating to be walking at night with a
rapidly dimming beam. In theory, voltage regulation should avoid this
eventuality without the use of expensive lithium batteries (which do
provide fairly stable output at low temperatures.
The Princeton Tec Eos headlamp utilizes a newly designed
collimator/lens system (manufacturer's press release). This, in
conjunction with the voltage controlthe lamp offers three modes of
illumination, plus a signaling mode, all with constant
brightnessshould make this lamp exceptionally adaptable and intensely
bright at maximum output. It uses a 1 watt Luxeon LED, made of doped
I will examine the following aspects of the headlamp.
1. How stable over time is the light output? Does the voltage control
circuitry perform its job appropriately? This will be tested both in
the field and (since subjective assessment of light output is tricky)
with a digital luxmeter (see my Zenix FR for methodology). I do note
that constant output is indicated for only a portion of the battery life.
2. In each of the standard illumination modes, does the battery life
match the specs?
High output mode 2 hours of constant brightness / 6.5 hours of run time
Medium output mode 9.5 hours of constant brightness / 12.5 of run time
Low output mode 28 hours of constant brightness / 36+ of run time
4. What are the limitations of each of these modes in practical terms?
Which mode is optimal for trail use, which for bushwhacking, which for
5. How much difference does the collimation system make (it does allow
the user to focus the light, in theory a great advantage for many
tasks)? Does the lamp swivel through 180 degrees or only 90?
6. How much improvement over these times do lithium cells provide? How
much of an improvement in stability of light output at lower temperatures?
7. How comfortable is the headlamp? Is the strap system, which seems
minimalist, stable? Is it easily dislodged by head movement? How does
it perform over a hat or helmet? How adjustable is the strap?
8. Does the lamp conform to any specific waterproofing standard? In
practice, how waterproof is it?
9. How easily is the battery compartment accessed? Can batteries be
changed with gloved hands? How easily is the switch operated?
10. Is the lamp resistant to moderate impact? How durable is it overall?
The points listed above are a sampling of the issues that I will be
examining if I have the privilege of testing this lamp.
My tests may be viewed at:
Black Diamond Zenix
MSR Missing Link tent
Tests in Process:
N.B. The LTR on this has been supplied but the test is on hold,
awaiting word from the manufacturer as to whether they want testers to
append information on the plastic version of the shovel.
GoLite Wizard jacket
IR supplied, FR due January
Dahlgren Backpacking Socks
IR supplied, FR due January
MSR Ascent snowshoe
Not yet received.
Applications in process
Exponent Flex 5 System with Batt Pak
Granite Gear Aptitude Gloves