EOS... What does that stand for, anyway? It probably
stands for "electronic operating system" or
something like that, but it may just as well stand for
"End Of Story", because this is the first
headlamp that rates a full 5 Stars here on FlashlightReviews.com!
(Actually, I found out what Eos is - Eos is the Greek
goddess of the dawn. Her Roman equivalent is Aurora.)
The body itself seems pretty standard, but it's the
little things that make it stand out. The casing is
polymer, with two pieces attached by a hinge. On the
back is a knurled screw that holds the two sections
together. The screw can be manipulated with your hand,
but is also slotted with a groove wide enough to accept
a small coin. There is a seal between the two halves
to prevent the entry of water and other environmental
contaminants. On the top is a rubber panel which covers
the switch. The forehead plate has no padded section.
Instead the headband threads through 2 slots in the
plate and rests directly against your forehead. This
creates a complete lack of pressure points and more
even distribution of pressure around your head. This
makes the headlamp more comfortable during extended
The bezel is recessed slightly and the optics are protected
by a polycarbonate shield. Inside is a Luxeon 1 high
dome LED (impervious to all but the most devastating
impacts) and a current regulator circuit. Now this is
no ordinary regulator. Lots of regulators out there
are PWM circuits which cause the light to flicker. Many
people can see this flicker and it gets rather annoying,
especially when reading. Well, there is NO FLICKER with
the EOS. You only see smooth, constant light at all
levels of brightness. The headlamp starts out at "high",
and moves to the next mode (medium, low, flash) with
each click of the switch. Leaving the switch alone for
about 3 seconds allows the light to be extinguished
by the next press of the switch.
Output is very nice - a smooth bright central spot
with a squarish spillbeam, both separated by a slightly
dimmer ring of light. Runtimes and output are listed
in the table below. Note too, that when the regulator
cannot provide constant current to the LED, it doesn't
just die. It gives you several more hours of "emergency
light" which dims over time, hopefully giving you
enough time to find your way to a new set of batteries!
2 + 4.5
9.5 + 3
44 + 16
throw readings are in Lux
at one meter. The numbers in parenthesis are for comparison
in the Comparison
Runtime listed for alkaline AAA with mode regulated
hours + additional unregulated hours after headlamp
drops out of regulation.
Runtime Plot: Manufacturer's statements about HIGH
runtime are right on! 2:15 regulated, diminishing thereafter.
completed with Energizer batteries. More information
on runtime plots is available HERE.
The switch is a simple click switch. It is just a touch
awkward for lefties to use, but not to any serious degree.
All around the battery compartment there is a rubber
seal to prevent the entry of water. The rest of the
light is also sealed and is rated by the manufacturer
as being water resistant to 1 meter (dunkable).
Ergonomics: Comfortable on the head, easy to adjust
both the light and the headband. The light itself can
be tilted on its forehead plate up to 90 deg, and it
gently ratchets in place past stops on the hinge to
prevent it from easily moving from its set angle.
For batteries it takes either alkaline, the new lithium
L92 energizer AAA batteries, or rechargables. Yes, that's
right, it takes the new lithium L92 batteries as well!
This means much better performance than alkalines in
cold weather. Rechargables will run the headlamp at
reduced runtime and brightness levels.
What I Liked: Waterproof to 1 meter,
Tough/impact resistant, Current based regulation, Good
battery life, Bright, Easy battery change, Lightweight,
Accepts alkaline, lithium and rechargeable batteries,
Easy to use.
What I Didn't Like: Not a thing.
Other Things I Noticed:
Conclusions: A great headlamp!
I really don't see any way to improve it. As I look
into my crystal ball I see a vague image of a AA version
of this same headlamp sometime in the future with the
battery pack in the back for extended runtimes. Well,
that's a pure guess, but who knows? I wouldn't be surprised
at all if that were next!