Dimensions & Weight
Case Material
Case Features
Case Access Type
Switch Type
Photon Management
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

1-Classification- The Coast/LED-Lenser LL7739 is a compact and pocketable sized handheld tactical flashlight. It uses a 1.25 Watt Luxeon LED emitter powered by 3 AAAA size batteries stored in a dedicated cradle in it's battery compartment.
2- Geometry- The light is a radially symmetrical cylinder.
4- Build Quality- The LL7739 is very well made by CNC machine process. There is some threading resistance.
5- Physical Features - Alluding to the ancestral LED-Lenser flashlight 'skins' . It looks rather minimalist in form with an aggressive diamond pattern knurling covering most of the handle and on the tailpiece. The push-button activation button barely breaks from the otherwise uniform curve of the convex tail cap . Unlike the typical rubber caps of most tactical lights, the button of the LL7739 is metal- giving it a classy look, more in keeping with the spirit of a gift or executive briefcase) tool rather than a truly tactical tailswitch. The head of the light is obvious in that it contains the Fraen optic.
6- Wall Thickness- The aluminum wall thickness of the battery tube is 2mm.
7- Finish- Metallic 'ALuminum'Type II anodizing on the outside and throughout the inside. This anodizing should be effective against corrosion.
8-Fit- There is no 'play' or rattle anywhere in the LL7739. A satisfactory 'O' ring seals the junction between tailpiece and body-, provide, a snug fit and a seal against the elements- especially water ( Tailswitch is not water proof for dunking) . The front bezel is not removable or easily accessible.

1-Controls- in normal use, light emits from the front of the flashlight when activation occurs through a either a partial or full pressing of the switch button. Operating the switch only causes the button to travel about 1mm for momentary and 3mm for full On. There is no 'lock-out' or other switch protection feature.
2-Component/Section Accessibility The front bezel section typical of most flashlights is integrated as part of the body, dis-allowing easy access to the enclosed LED module . The LED module is therefore not easily removable without tools and may only be accessed through the battery compartment.
3 -A removable tailpiece protects the battery compartment from the environment by a single 'O' ring and allows for battery replacement. Contact pressure with the battery is furnished by a coiled spring in the tailpiece. The pushbutton tailswitch is water resistant but not waterproof.

1-Deployment- The LL7739’s simple geometrical shape suggest that it may be easily stowed and deployed in a manner similar to other such lights. It slides in and out of pockets. The flashlight 's On/Off functionality is simple to activate and follows the use model of many similar lights of this caliber.
2-Basic Use Model . The switch is at the tail end rather than at the head.
3-Changing 'States'- Focus is fixed at the optimal beam angle produced by the matched optic.The switch functional model is standard and since there are only three states, it's easy to learn
4-Usage Options The LL7739 is a light that can be carried or stowed loosely in a pocket or compartment, or it may be attached to a tether through it's ring hole.

1-Sumarry Comments-The LL7739 is a decent quality flashlight that's ideal for medium-range tasks including: personal illumination, emergency, and as a back-up to larger and more powerful flashlights. We judge it to be an excellent choice for medium range general nocturnal activities as well as for everyday personal and occupational carry. It is well built and has a finish that alludes to that of custom made flashlights. It represents an excellent total package for presentation as a gift.
2- Outstanding features:
- Looks and feels like a solid all purpose and back-up tactical light or elegant pocket or briefcase torch
- Exquisitely neutral LED BIN color
- A potent optic
- Uses an environmentally friendly and readily available battery type
3-Value. An excellent package value considering all the features against the cost
4-Areas Cited For Improvement A) Does not stand up on its tail B) emitter cannot be exposed for candle mode C) Batteries are slightly slower to reload that on cradle-less flashlights.

Pros= Decent fit and Excellent finish | Exceptional brightness and neutral spot beam | Uses rechargeable as well as disposable batteries |Competitively priced as a value leader in its class | Exquisite presentation packaging
Cons= Slightly rough threading| Will not stand on tail | Less than ubiquitous retail availability

4.25 Stars- Highly Recommended

ABOVE:RIGHT Note - Carabiner in belt-loop

ABOVE - Note Cyan tint behind optic




ABOVE: LEFT - Note subtle activation button profile | RIGHT Signature LED-Lenser port holes

ABOVE: Note 24K Gold plated contacts on tailpiece

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)

(*3) Usability testing results - in progress.

(*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