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Fenix TK40 High Performance Cree LED Flashlight, Maximum 630 Lumens

by FENIX
2.5 out of 5 stars 86 customer reviews
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  • Uses eight 1.5V AA batteries (not included) and maintains excellent constant brightness with two output modes: 8 output types,including Turbo output which can be used whenever high-powered light is needed, exploration, search & rescue, long-range ID
  • Cree MC-E LED2 modes with 8 types of output -4 types of primary output: Turbo (630 Lumens, 2Hrs), Low (13 Lumens, 150Hrs), Mid (93 Lumens, 20Hrs), High (277 Lumens, 6.8Hrs) -4 types of strobe: Strobe, Slow flash, SOS, Fast flash
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Product Description

Product Description

TK40 is the first four-core LED flashlight of Fenix, which provide high brightness and long-throwing beam. CREE MC-E four-core LED, max output reaches 630 Lumens, which makes it the world’s brightest AA flashlight. Optimized circuit with large reflector throw 300m (984ft) long lighting beam. Intelligent memory circuitry memorizes last primary output when activating the light. The TK40 produces great power with standard AA batteries. The battery is inexpensive and widely available. This light is suitable for outdoor hunting, exploring, search and rescue, and all other extreme adventures in your life. • Cree MC-E LED with lifespan of 50,000 hours • Optimized circuit with large reflector throw 300m long lighting beam• Intelligent memory circuitry memorizes last primary output when activating the light• Two modes of 8 type output: 4-type of primary output: Turbo Mode: 630 lumens (2hrs)-> Low: 13 lumens (130hrs) -> Mid: 93 lumens (20hrs) -> High:277 lumens (6.8hrs) 4-type Strobe mode: Strobe->Slow Flash->SOS->Fast Flash• Uses eight 1.5V AA batteries (Alkaline, Ni-MH) 4 AA batteries is available for emergency)• Reflector with high efficiency and focus for far throw and wide lighting range• Constant brightness with efficient circuitry and reverse polarity battery protection• Digitally regulated output - maintains constant brightness• Low power Indication with over discharge protection • Durable Type III hard-anodized anti-abrasive finish• Push-button tailcap switch• Made of T-6 grade aircraft aluminum• Type III hard-anodized finish• Waterproof to IPX-8 Standard• Toughened ultra-clear glass lens with anti-reflective coating• Capable of standing up securely on a flat surface to serve as a candle• Included accessories: shoulder strap, lanyard, rubber switch boot and two spare o-rings.

Amazon.com

With its four-core LED bulb and 630-lumens brightness, the Fenix TK40 high-performance flashlight is ideal for outdoor hunting, exploring, search and rescue, and a host of other extreme outdoor adventures. The TK40--the world's brightest AA flashlight--is equipped with a Cree MC-E LED bulb with a lifespan of 50,000 hours. The bulb provides an extremely bright long-throwing beam that extends for up to 984 feet, plenty long enough to light the path ahead. The TK40 also produces four output levels: turbo (630 lumens), which runs for up to two hours on a set of eight AA batteries; high (277 lumens, 6.8 hours); mid (93 lumens, 20 hours), and low (13 lumens, 150 hours). As a result, users have plenty of lighting options for any scenario. Users can even use the light as a strobe, with four strobe settings: strobe, slow flash, SOS, and fast flash.

The flashlight is also well built, with a durable aircraft-grade aluminum body coated with a premium Type III hard-anodized, anti-abrasive finish. The construction--which also includes a toughened ultra-clear glass lens with an anti-reflective coating--helps the light hold up to all kinds of abuse. Other features include intelligent memory circuitry that memorizes the last primary output when activating the light; a digitally regulated output; a pushbutton tail cap switch; and such accessories as a shoulder strap, lanyard, rubber switch boot, and two spare O-rings. The TK40, which also stands on a flat surface to serve as a candle, carries a limited lifetime warranty.

Specifications:

  • Output types: Turbo (630 lumens), high (277 lumens), mid (93 lumens), low (13 lumens)
  • Flashing outputs: Strobe, slow flashing, SOS, fast flashing
  • Max beam length: 984 feet
  • Central light strength: 18,000 candelas
  • Impact-resistance: Withstands impact from 1.5 meters
  • Waterproof: Yes, to IPX-8 standard
  • Bulb: Cree MC-E LED
  • Bulb lifespan: 50,000 hours
  • Batteries: 8 1.5-volt AA (Ni-MH or alkaline)
  • Dimensions: 1.57-inch body diameter, 2.44-inch head diameter, 7.87 inches long
  • Weight: 9.38 ounces (not including batteries)

Product Details

  • Product Dimensions: 8.2 x 2.4 x 2.4 inches ; 10.1 ounces
  • Shipping Weight: 1.5 pounds
  • ASIN: B0020XF0JQ
  • Item model number: TK40
  • Average Customer Review: 2.5 out of 5 stars  See all reviews (86 customer reviews)
    • Product Warranty: For warranty information about this product, please click here
Customer Questions & Answers
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Customer Reviews

Top Customer Reviews

5.0 out of 5 starsBrightest Light That Runs on AA Batteries
By Menace915 on June 3, 2009
The Fenix TK40 is a great tool comparable to a 10 watt search/rescue HID (high intensity discharge) light, but since it is a LED, it is brighter, more efficient, and its multiple light levels make it more functional and more applicable to different tasks.

PROs:

* EXTREMELY BRIGHT--> up to 630 lumens on turbo mode. However, it also has 13 lumens, 93 lumens, and 277 lumens. This allows you to compromise between brightness and battery life, and to use it for different tasks.

* Runs on inexpensive AA batteries (8 of them), rather than on lithium or 123A's. It can use rechargeable batteries.

* Each intensity (low, medium, high, turbo) has slow flash, fast flash, SOS, and tactical strobe abilities.

* Hard aluminum body, resistant to almost any mishaps you might get this light in.

* Can run on 4 AA batteries if that's all you have.

* The low output is very useful, and it can run for 130 hours.

* Digital regulated output will maintain the brightness stable even when the batteries are low ( will not dim as the batteries become wasted).

* Has an anti-roll design.

*It is waterproof (it was tested by being submerged in 2 meters of water, in which it lasted waterproof for 30 minutes). This means you can use it in the rain without fear of it being damaged).

* Excellent peripheral light and great "throw."

*Includes a nice carrying case, a shoulder strap, wrist lanyard, extra O-rings, and and extra rubber switch boot.

Cons:

* You can only use the turbo mode for no more than 15 minutes at a time (according to manufacturer recommendations).

*If you use lithium batteries, you void the warranty.

* Batteries are NOT included.Read more ›
15 Comments 94 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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5.0 out of 5 starsFenix TK40
By T. Dennison on June 1, 2009
Verified Purchase
If you're looking for the brightest flashlight around (and a very fun toy), this is it. I did extensive research on the what people felt was the brightest flashlight on the market. There were no reviews for this one because it's brand new, but with a lumen rating of 630, how could you get anything brighter. So I bought it and I've never regretted it. It has 4 settings and the lowest setting is about equivilant to my 4D maglight. The 2nd setting outshines my 120 lumen Dorcy. The amazing thing about the stream on the highest setting is that the light doesn't disipate with distance, as most other lights do. For example, I pointed it at a stop sign about 800 feet away and it lit it up like a christmas tree. I don't know any other flashlight that will do that. We took it camping recently and put it up against my 1M candlelight spotlight, and my suburban's high beams and it out-shown both. Amazing!

Other notables, it runs off 8AA batteries, but will operate off 4AA batteries with no decrease in light. It has 4 settings, with 4 corresponding strobe functions. The batteries will die on you after about 2 hrs constantly on high, but they'll last for weeks with normal use on the 1st, 2nd, or 3rd light settings. It advertises that it's completely submersible to 8 feet, but I'll never do that. It is good to know that it will most likely be perfectly fine in a rain storm though. As far as size, it is a tad big and heavy for a tactical, but I absolutely don't mind. It feels solid and unbreakable and I like that.

I love this flashlight. Do I need a flashlight of this magnitude, no. Fun to play with though, absolutely. Worth the money I spent on it. . . I don't know. I suppose it depends on how much you have and are willing to spend. If you simply want the brightest AA flashlight on the market however, this is it.
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5.0 out of 5 starsWow... Just wow...
By Steve on May 12, 2009
This flashlight is the brightest light I have ever used. It puts any stock Mag Light to shame, and most other flashlights out there. If you want something to light up the night, this is a great choice.

What attracted me to this light was the fact that it could run on 4 AA's or 8. I didn't want to bother with special lithium batteries or the 123 cells. This light is extremely bright for a AA light, and no words can describe it, you have to see it in person. It has low, medium, high, and turbo. I find that medium is a good all-around setting and leave it on that until I need to really light things up with turbo.

Overall it's an amazing light, something you need to try to believe, you won't be disappointed.
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3.0 out of 5 starsZombie Killer. Excellent when it works. Fenix warranty is confusing
By RT on February 15, 2010
There already are plenty of reviews online about the light, its accessories, and its durability. I will describe my experience with Fenix's customer service when the light malfunctioned.

This flashlight has Cree MC-E Quad Super LED. All four LEDs in the assembly are supposed to light up together, whether at low power or in turbo mode. My first copy purchased from Amazon worked great for about a month or two and then one of the LEDs went semi-dead. Looking carefully, I could see that one of the four LEDs would light up only in turbo mode, and even then it flickered -- with eight fully charged Eneloop batteries. Amazon sent me a replacement that worked fine.

Before the light was replaced, I reported my problem to Amazon and they pointed me to Fenix's customer service. Fenix replied that warranties are only honored if the item was purchased directly from their website. Since my light was purchased from Amazon, Fenix declined to help me directly. Finally, I brought up this issue with Amazon, and after verification with Fenix, they sent me a replacement.

Otherwise, TK-40's performance is superlative. On a fishing trip it outshone the boat's searchlight; it is bright enough to get you in trouble on road or off road (your neighbors will fear it). I announce my arrival with the strobe mode. When the zombie apocalypse decends upon us you must remember to have at least three of these and Brunton's Solaris.

One word about the "630 Lumens" figure. There is some dispute over whether Fenix reports emitter brightness or out-of-the-front brightness, I suspect it is the latter.

Build-wise, all Fenix products have hard anodized finish, are waterproof and shockproof etc. but Fenix's goal is always "brightness".Read more ›
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Most Recent Customer Reviews

2.0 out of 5 starsWarning

I own this flashlight, the battery holder is plastic and recently it broke apart. I contacted the company by email to obtain a new battery holder. Read more

Published 5 months ago by Allen O. Stockton
1.0 out of 5 starsOverheated when the flashlight was not in use

It was just sitting in my cabinet, and the flashlight became very hot and the inner plastic battery housing melted inside of the metal casing.

Published 5 months ago by Wes
1.0 out of 5 starsTK 40

Junk. Had to throw away. Had a short or something. New batteries 8 Duracell leaked. 8 AA rechargeable never kept a charge. Stay with single cr 123a flashlights. Read more

Published 9 months ago by pale4thrider
1.0 out of 5 starsStopped working after 6 months.

Disappointed it stopped working after about 6 months even bought the TK 41 and the buttons stopped working after around 8 months. Read more

Published 18 months ago by B
1.0 out of 5 starsDon't buy this flashlight. I have purchased 2 over ...

Don't buy this flashlight. I have purchased 2 over a couple years and both have the same problem. It drains the batteries when left in and on off switch/ mode button stops working... Read more

Published 20 months ago by ryan bledl
5.0 out of 5 starsFive Stars

Great flashlight very powerful.

Published 23 months ago by Tim Palmioli
5.0 out of 5 starsWorth the money.

Have used this five years in HEMS. Only problem was initially having to tighten some screws in the battery holder assembly.so power delivery could resume. Read more

Published on September 29, 2014 by Craig Clapper
1.0 out of 5 starsI bought three Fenix models based on good reviews. All three somehow...

I am staying away from Fenix from now on. This is the only flashlight that attracts corrosion of batteries (good quality Duracell batteries). Read more

Published on September 26, 2014 by blue air
1.0 out of 5 starsnot worth the investment

160.00 for a light that failed after 5 years of in-house, very light use. We left it sit on the counter and 2 times a month used it to watch the dogs in the backyard at night. Read more

Published on August 22, 2014 by A. Middendorff
5.0 out of 5 starsVery well built!

Fenix is the best out there. I expected it to be brighter than my Fenix tk10 which it is but doesn't seem as such because the beam isn't as tight. Read more

Published on July 16, 2014 by Chad

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