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Dimensions
& Weight
Case Material
Case Features
Case Access Type
Switch Type
Reflector Type
Lens Type
Bulb Type
Circuit
Beam Type
Beam Characteristics
Overall Output
Nominal Color
Battery / Power Type
Battery Life (advertised)
Environmental Protection
Accessories
Special Items of Note
Warranty
Retail Availability & Cost |
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Diameter (inches) 0.9" /1.25"
Head ,L 4.9", W 4.3 oz (116Grms). with batteries
Machined aluminum, Type II anodized
Heavily ribbed surface for grip/ Removable spring clip on side.
Unscrew tailcap for battery change/Unscrew head for bulb change
Tailcap- press for momentary, twist for On/Off
Polished textured aluminum
High temperature glass
High Dome (Lambertian) Luxeon Star 1W
Unregulated
Adjustable spot/flood
Smooth spot, hole appears in beam when focused wide
30 Lumens (Advertised)
Color temperature (estimated) 5,500ºK
3V Cell Type 2 x CR123A- Streamlight branded lithiums - included
3.5 hrs to 50%, 20 hrs. diminishing thereafter (Advertised)
O-ring seals "water resistant"
Streamlight design lanyard- included
Clear plastic 'blister' packaging
Lifetime
$74.95 as evaluated http://www.pocketlights.com |
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Form Factor & Build
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- Classic hand-held
flashlight shape. Geometry is a radially symmetrical round
cross-section/featuring a six grooved anti-roll head, strategic
& functional groove knurled bezel and tail grips and deeply
grooved body section grip.
- Head of Light is wider than the body & tail-piece which
are the same diameter.
- The flashlight feels small and very lightweight, even with
batteries- and yet it's not so small as to be difficult to
manipulate with a large or medium sized hand.
- One's hand surrounds the aggressively grooved body of the
light.The body of the light fills 3/4 of a medium (*1)
sized palm without protruding.
- Six 'notches' on the head somewhat prevent the light from
rolling on a smooth surface.
- The aluminum wall thickness of the battery tube is 2 mm.
- All sections fit moderately well though 'roughness' in threading
action is evident.
- Type II (Matte) anodizing on the outside and inside the
battery compartment - offers some protection against corrosion.
- Matte black finish minimizes reflections and visibility
at night.
- There is no 'play' or rattle anywhere. Thin 'O' rings provide
some shock absorption, a snug fit and a seal against the elements.
- The Removable spring steel clip attached is , rudimentary
and sharp edged.
- Rugged look & feel with impressively effective grip.
It 's a generic candidate in the 1W Luxeon flashlight market
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| Ergonomics
& Mount Options |
1-
Ambidextrous.
2- Three quarters of a palm completely surrounds
the body of the TL-2 LED, with the thumb and first or second
fingers- naturally positioned on the front of the body section
just behind the head-portion. Its ideal for smaller hands
but eminently hold-able by medium or large hands as well.
A 'forward hold' on the head section may also be used . It
may be hand-held in various positions including: Harries Flashlight
Technique,Rogers hold, forward, upward and downward pointing
'standard' flashlight hand-held modes. Customary knurling
over the body section is replaced by an evidently more aggressive
and glove friendly longitudinal and circumferentially oriented
series of grooves-a refreshing departure from the norm . Finer
longitudinal knurling on the head and tail-piece aid in part
removal and replacement as well as switch activation (tail-piece)
3- A spring steel clip facilitates attachment
to pockets or edges. A Streamlight designed (wrist/neck) lanyard
threads through a cut-out in the clip to allow for lanyard
carry. Clearance for lanyard threading measured at 2mm
4- A rudimentary momentary On /Twist On/Off
tail-piece switch allows for constant or intermittent light
activation.
5- No native mounting options for fire arms
use are evident, though the mid-section may allow for dedicated
clamping brackets or other improvised and custom designed
attachment solutions. |
| Affordances |
1-
Stowage- No stowage pouch/holster/sheath are offered- though
third party ones should be plentiful.
2- A Streamlight designed lanyard is a black
heavy duty multi-braided cord secured by two cord-locks and
terminating in a strong braided loop- suitable for threading
into a hole as small as 2mm.
3 - Activation- In normal
use, light is emitted from the front of the flashlight when
activation occurs through a full clockwise turning of the
tail-piece till it stops. There is no 'follow-through' position.
De-activation is implemented via an anti-clockwise turning
of the tail-piece. In the 'Off' position, a partial (soft)
activation of the momentary button switch causes the light
to turn on. An immediate release of pressure, causes the light
to turn back off.This is known as 'momentary' mode. Intuitive
use involves one hand holding the light while the free hand
turns the tailpiece or with the light in 'Off' mode, one hand
may be used to activate the light in the Harries or Rogers
holds- for example. The tailpiece may also be turned with
the fingers of the supporting hand.
4-The head is comprised of two sections.The
front bezel and a head section proper. Using a 5/64"
Allen wrench (not included) the user may remove the factory
attached spring steel clip from the head. The front bezel
is removed by unscrewing, to allow user access to the lens
, emitter module and reflector compartment. The head section
itself, seems not to be user removable from the body section.The
head and tail sections are protected from the environment
by thin single 'O' rings and substantial thread lubrication.
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| Human
Factors & Usability |
1-Matte
black anodizing protects the surface that is machined throughout.
2-The aggressive texture on the body section
gives users a confidence in holding this light, either with
bare or gloved hands. We did not perform a 'pull' test but
it was obvious that the light was both extremely easy to manipulate
with one hand - and not about to slip away from it's operator's
hands very easily.
3-The lack of a holster (useful for protecting
the light and especially its lens) is somewhat offset by the
lanyard though not so much by the spring clip. The spring
clip is made from a gauge of steel that seemed easy to distort
and bend. We judged it to be a "light-duty' solution
at best. In addition, the clip has rather sharp edges that
could potentially cut the user's hands as well as cut through
or wear down clothing. We were concerned about how long the
thin terminal loop of the (wrist/neck) lanyard would last
before being cut-through by the edges of the spring clip-
until we discovered that it's made from braided 50Lb test
Spectra® fiber-a form of polyethylene and one of the world's
strongest fibers.
4- The lightness and highly compact form
factor make it suitable for pocket carry (depending on the
type of pocket). It may also be used as a small Kubotan/Baton
light . It is certainly suited for outdoors,and light environmental
exposure-though it's viability in water-sports or underwater
is probably limited due to the light duty 'O' rings and less
than high precision threading.
5- We liked this light best either in our
hands- clip removed. or in a headband such as the Nite-Ize.
Due to it's comparative lightness to some other 2,CR123 cell
lights in its class, it really deserves a lanyard hole somewhere
near the tailpiece.
6-The On/Off activation procedure seems like
a usability compromise when compared to other alternatives
on the market, such as toggling Click On/Off mechanisms. The
switch is relatively intuitive and the cognitive model is
simple and easy to remember.
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| Beam
Quality & Characteristics |
1-
The beam is round shaped- thanks to a polished reflector rather
than a collimator optic.
2- The round-shaped beam was excellent for
general searching though it was not quite focused enough to
create bright ambient room lighting through ceiling bounce
mode .It is not suitable for candle mode. It creates a subject
illumination in a category that we've codified as
Context Inclusive Illumination Window (CIIW) as compared
with a Context Exclusive Illumination Window
(CEIW) (*5)
3- For one test, We used the TL-2 LED in
my preferred holder- a Nite-ize headband, and walked around
in a nearby trail. It comfortably illuminated the trail about
40 feet ahead but lost throw much beyond that. For light-weight
close proximity foraging it was more than adequate.
4- There is some unevenness in the beam's
tonal distribution-characterized by a dark hole where the
brightest part of the hotspot would normally be expected to
appear- as well as a 'blotchiness' in the center.This is minimized
depending in the flood setting and is most evident in the
'spot' position- rather the reverse of user expectations.
The brighter hotspot is surrounded by a broader 'corona' or
penumbra that furnishes good context inclusive illumination.
I would characterize such a beam as a compromise between a
truly tactical spot and a general purpose flood.Its very similar
in shape to the beams put out by several tactical weapons
lights-but without the brightness of true tactical lights.
It would serve admirably for security,camping and other outdoor
sports.
5- While the supplied reflector is probably
good enough for most target customers, the addition of a diffusion
material behind the lens would greatly smooth out anomalies.
6-To test the throw of the TL-2 LED,
we conducted a Maximum Distance for Object Identification
or MDOI (*2) trial and managed to
confidently differentiate our test subject (a Black
33 Gallon (124Litre) Trash Bag) from its immediate
surroundings, from as far away as 118 feet (xxx
Meters) with the subject area in near total darkness and the
evaluators and flashlight in a moderate level of street sodium
vapor ambient lighting (RH=86% at 510ºf). This test simulated
a person searching for an object of known size -a person for
example- but located in an unknown or difficult to spot container
-a black trash bag, for example. From 118 (xxx Meters)
feet away, the TL-2 LED positively lit up the vegetation surrounding
our subject enough to clearly distinguish it from the Black
33 Gallon Trash Bag, that lay on the ground.The estimated
contrast ratio was 3:1
Beam-shots Page >>
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| Light
Quality |
1-The
color chart tests photographed with a digital camera set for
Daylight White Balance and exposure set- to properly expose
the gray areas of the chart to 50% or Zone V- 'Mid-tone Gray',
revealed a color temperature of roughly 5,500ºK (Daylight) .
Comparing the TL-2 LED chart photograph with
a flash (White Balance set to 'Flash') exposure of the same
chart reveals a near perfect rendition with perhaps a very slight
bias to blue. This makes it superior in situations that demand
the highest caliber of color differentiation. It could probably
be used to make an accurate color photograph that would rival
one made in natural daylight at high noon or with flash.
2-In general, our experience has shown that
such pure white light is eminently suited to forensic, search
and rescue and generally indoor use in clear-air spaces. Pure
White or Blue biased light has been problematic in tests where
a substantial amount of water vapor,mist, dust, pollen or other
fine particles are in the air due to the tendency for such particles
to reflect, diffuse and other wise re-direct the light beams
as they travel to their subject destination. For such situations,
yellow, amber or red filters or lights towards the yellow/orange/red
end of the spectrum seem to have better penetration. Having
said this, the TL-2 LED performed well, piercing
118 feet of 'mist laden' air on an evening with an RH of 86%
with only some cyaninsh glare.
Beam-shots Page >> |
| Brightness |
The Streamlight TL-2 LED scored Maximum Distance
for Object Identification or MDOI at 118
feet -quite adequate for general searching,
close up inspection and general personal flashlight tasks.
Beam-shots Page >>
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| Conclusions |
1-
The Streamlight TL-2 LED is a lightweight,
light-medium duty personal flashlight that's ideal for general
flashlight tasks in a number of everyday
and professional situations. Due to the rather marginal waterproofness
and modest beam brightness, we hesitate to characterize it
as a true tactical light.
2- This light provides fairly intense 'close-up'
illumination and it delivers a useful beam that combines a
flood with a spot from one reflector.
3- Despite having a less than perfectly modulated
beam- the color fidelity of the emitter more than compensates
for this shortcoming. Adding a light diffusion material to
the lens would neutralize any anomalies with a slight decrease
in brightness.
4- The well thought out Streamlight lanyard
is poorly matched to the flimsy and sharp-edged clip to which
it is meant to to be attached.
5-Value. With new flashlights in the 1 &
2,CR123 / 1W Luxeon market space -being released weekly- it's
hard to define a relative value when comparing non-comparables.
At this point in time, the Streamlight TL-2
LED rates 3.0 stars out
of a possible 5 stars.
Our gripes were... A) poorly formulated reflector delivers
a blotchy hotspot. B) Rough threading does not exude quality
of construction C) Pseudo-tactical tail switch is not as user
focused as it might otherwise be. D) Rudimentary clip poorly
serves as a lanyard attachment point and has a potential for
user injury
3 Stars-
Marginally Recommended
Pros= Exceptional color fidelity for it's price-point
|User replaceable emitter module and lens| Compact form-factor
| Light weight | Exceptionally effective grip pattern | Handsome
modern interpretation of a classic tool.
Cons= Blotchy beam pattern | Marginally useful
focusing feature| Less than 'tactical' brightness|Not-candle
mode usable|Rough parts threading | light duty construction
|Marginally 'tactical' tail swtich | Low quality of presentation
packaging for its price point
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| Pictures |
 

© Streamlight
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Footnotes:
(*1) Medium Men's glove size- Also, a Standardized
Flashlight Hand Size Metric (SFHSM)
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Small
A-B = 4.5" or Shorter |
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Medium
A-B = 4.5"-5" |
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Large
A-B = 5"-6" |
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X-Large
A-B = 6" and Longer |
(*2) Maximum Distance for Object
Identification (MDOI). The maximum distance that
a person without the aid of magnification-can with normal
or corrected vision, under a given ambient level of light,
identify an object of known size, and clearly distinguish
it from its surroundings. We have tentatively identified the
following scenarios for such measures:
- A single average sized person/body identification scenario
- Urban (city, inside buildings, dark alley, lit streets)
- Rural (countryside,farm residential backyard)
- Environmental (dessert, woods, wetlands, over water)
- Natural & manmade disaster (fire, flood/mudslide,earthquake,
hurricane /tornado,bombing scene, collapsed structure
etc)
- Small Inanimate Object (smaller than a shoe-box)
- Medium Inanimate Object (Black Plastic 33 Gallon (124Litre)
Garbage Bag stuffed with a big sleeping bag)
(*5) Context Inclusive Illumination
Window (CIIW) as compared with a Context
Exclusive Illumination Window (CEIW)
.
- CIIW describes a subject illumination
paradigm wherein the illumination target is the focus of
the beam's brightest disc or 'Hotspot' and peripheral objects
to the target are more dimly illuminated in a larger disc
that surrounds the focus or hotspot. This outer region is
also referred to as a corona or penumbra.
- (CEIW) describes a subject illumination
paradigm weherein the illumination target is the focus of
the beam's brightest disc or 'Hotspot' and peripheral objects
to the target are not sufficiently illuminated
to be easily discernable at the periphery
of subject beam's focus or hotspot.
©
2004 - Imägo Metrics - All Rights Reserved
Original standards designations (including acronyms) depicted
in this, as well as all of our evaluations are the exclusive
intellectual property of Imägo Metrics LLC and subsidiaries.
Reproduction without prior written permission is strictly
prohibited
All
Photographs © 2004 - Imago Media |
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Legal
© Copyright 2003 Imägo Metrics LLC - All Rights
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