Imago Metrics Engineering Human & Technology Performance
Home Solutions About Us Services Methods Markets Contact

<FLASHLIGHT REVIEWS
Dorcy 1W, 1X CR123
Model # 41-4262

Quick Facts:

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

.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
.......
Diameter - Head1" / Body .8", L 3.7", Weight 2 oz.with battery
CNC Machined aerospace-grade aluminum, HA Type II anodized throughout
Machined grip and head
Unscrew tail-section for battery change
Tailcap- Click On/Off, Momentary Off available
Shiny smooth reflector
Polycarbonate
High Dome (Lambertian) 1Watt White Luxeon Star LED
Unregulated
Wide with tight hotspot
Bright center and 'stepped' corona . No voids or anomalies
35.0 Lumens (Nominal)
Varies / 5400K Nominal
3V Cell Type. 1 x CR123A- included
45 minutes unregulated to 50% of output, gradually diminishing thereafter
'O'-ring seals
N/A
Retail 'Blister' packaging
1 Year Limited (Excludes batteries)
TBA $24.99 http://www.dorcy.com/41-4262.htm

Form Factor & Build

1- Modern 'Machine Age' interpretation of the classic hand-held flashlight form. Geometry is a radially symmetrical ( round cross-section / featuring some geometric elements including: ribs around the body for traction and faceting around the head to prevent rolling on a flat surface.
2- The head of light is wider than the body & tail-piece which are approximately the same diameter.
3- The flashlight feels significantly lighter than many flashlights of comparable output. Solid construction and 'just enough' heft contribute to giving the Dorcy1X123 excellent balance in the hand. Ideal for individuals with small to medium sized hands, it's quite holdable by users with large or extra-large hands as well.
4- Lacking any aggressive, this light slips easily into pockets and purses. Lacking a clip or any sharp eegs at all there's nothing to snag on the Dorcy1X123
5- The aluminum wall thickness of the battery tube is 1.5 mm.
6- All sections fit together extremely well with no rough threading action.
7- Titanium colored Anodizing Type II (shinny) on the outside and on the inside of the tailcap and body section provide protection against corrosion.
8- This is a very rugged little pocket light with a look & feel of a quality personal tool. It's suitable for any application where a bright light is needed for short periods in a pocketable product.

Ergonomics & Mount Options

1- Ambidextrous. Center of balance slightly in front of the midpoint on the body section.
2- The ift of the Dorcy1X123 in one's hand is generic . It neither conforms nor does it interfere with holdability

Affordances

1- Stowage- No stowage option is offered and there is no native attachment point for lanyards or keyrings.

Human Factors & Usability

1-The Dorcy1X123 design promotes intuitive grip focus on the region between the tailcap and the head.
2- We did not perform a 'pull' test but we judged the heavily ribbed body section to be an effective mitigator against hand slippage.
3- The lightness, brightness and sturdiness of this light make it suitable for critical inspection, law enforcement, tool box, briefcase,purse and other everyday locations
4-The toggling push for click On/Off activation procedure is an intuitive and fast implementation of the switch.
5- Due to an infinitesimal protrusion of the rubber switch button- the light may be stood on its tail for ceiling bounce mode but with a slight tilt. NOTE- The shroud surrounding the switch button is no more than .25 mm short of being adequate for enabling this light to stand perfectly upright on it's tail.
6-The integrated emitter assembly is fully user accessible as is the tail section.

Beam Quality & Characteristics 1- The shinny reflector of the Dorcy1X123 creates a bright circular beam that is a wide flood of light with a wide circular hotspot in its center . The beam splits into distinct and 3 concentric regions that emanate from the center.
2- The wide and round-shaped beam is excellent for general searching and is bright and wide enough to create a floodlit effect in a room or to shed a wide swath of light on an exterior scene.
3-The Dorcy1X123 creates a subject illumination in a category that we've codified as an extremely Context Inclusive Illumination Window (CIIW) as compared with a Context Exclusive Illumination Window (CEIW) (*5)
4- Due to it's Neutral LED bin lot, the Dorcy1X123 was ac capable in the outdoors as it is inside- without the slightest hint of blue or cyan in its beam to negatively affect vision and object perception.
5- Due to its relatively smooth beam, the Dorcy1X123 did not exhibit object 'burn-out' at medium ranges.
6-To test the throw of the Dorcy1X123, 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 120 feet with the subject area in near total darkness and the evaluators and flashlight in a moderate level of street sodium vapor ambient lighting (RH=70% at 75f). 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 120 feet away, the Dorcy1X123 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 2:1
Light Quality 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 that the Dorcy1X123's color is consistently around 4,500K from center to corona. Comparing the Dorcy1X123 chart photograph with a flash (White Balance set to 'Flash') exposure of the same chart reveals no color shift whatsoever. This makes it ideal for situations demanding the highest fidelity of color differentiation.
Conclusions

1- The Dorcy1X123 is a medium/heavy duty rough use flashlight that's ideal for general flashlight tasks in a number of everyday and several demanding applications. Due to its robust construction and waterproofness- combined with bright beam, we judge it to be an excellent choice for any flashlight tasks that demand reliability and a relatively long-life bulb.
2- Longer lived than Xenon bulbs of comparable brightness- the 1 Watt Luxeon LED that the Dorcy1X123 uses has a substantially longer life (100,000 Hrs) than a comparable flashlight with a 3 Watt Luxeon LED (10,000hrs) - making it around 15% less bright than a comparable 3W flashlight but in exchange for 10 times the life span . The 1W Luxeon head is a better short and long term value.
3-Value. With new flashlights in the Luxeon market space -being released weekly- it's hard to define a relative value when comparing non-comparables. The Dorcy1X123 is an excellent value in a class with one at a similar price point. At this point in time, the Dorcy1X123 rates 4.5 stars out of a possible 5 stars.
Our gripes were... A) Cannot stand up perfectly in Ceiling-bounce mode B) Lacks a keyring or lanyard attachment point D) No momentary On function

4.5 Stars- Highly Recommended-Value Leader

Pictures








LEFT, Nuwai Quantum III (Titanium ) | RIGHT, Dorcy 1W, 1X CR123

LEFT, Dorcy 1W, 1X CR123 | RIGHT, Nuwai Quantum III (Titanium )

LEFT, Dorcy 1W, 1X CR123 | RIGHT, Nuwai Quantum III (Titanium ) / Note: Amber filter on QIII

LEFT, Dorcy 1W, 1X CR123 | RIGHT, Nuwai Quantum III (Titanium )

ABOVE, Detail of tailpiece showing activation button profile

 

Footnotes:

(*1) Medium Men's glove size- Also, a Standardized Flashlight Hand Size Metric (SFHSM)

  Small A-B = 4.5" or Shorter
  Medium A-B = 4.5"-5"
  Large A-B = 5"-6"
  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 wherein 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


 

 




 

 

 
 
Site Map
 
 
Addresses French Japanese Deutch
 
Legal © Copyright 2003 Imägo Metrics LLC - All Rights Reserved