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Tons Of Lumens! Fenix TK75 Review [Maybe A Little Hot…]

Are you looking for a reliable light that can be used for different applications? Do you need a light that you can depend on in a real emergency? If this is the kind of light you are after, you want to look into the Fenix TK75. A member of the Fenix tactical family, the TK75 is a durable light designed for a variety of applications. To find out more about what this flashlight has to offer, keep reading our Fenix TK75 review.

Before You Buy

Finding the right flashlight for the job at hand is not as easy as it sounds. When looking at flashlights you need to consider the various options and find one that is easy to use. Looking at all of the options available improves your chances of picking the light you need. The Fenix TK75 is a powerful flashlight that is durable enough to last a lifetime. With the Fenix TK75 you won’t need any special training to use it, but reading the instruction manual can help.

When selecting a light, you need to consider brightness, durability, and features offered. In most cases, the brighter the light is the better. But, some applications need very low illumination. Look at the range of lumens offered to find one that offers you the right fit. Durability is also something you need to carefully consider. You want something that is going to last, so look for lights manufactured from high-quality parts. Extra features are nice, but sometimes you don’t need all the bells and whistles. Knowing what you need and want in a light allows you to pick the best one.

Fenix TK75

FENIX TK75 5100 Lumen 2018 Edition 4 CREE LED Flashlight/Searchlight with 2 X EdisonBright BBX3 battery carry cases bundle

For a durable and powerful light that can be used in a variety of applications, the Fenix TK75 is an excellent choice. In 2015, Fenix upgraded the original Fenix TK75 to the Fenix TK75 2015 Upgrade. The previous version was an excellent light at the time, but Fenix knew customers needed more power and versatility. The new TK75 offers four brightness levels ranging from 35 to 4,000 lumens, plus Burst and Strobe mode. By upgrading the TK75 Fenix was able to deliver the power their customers needed in a tactical light.

The Fenix TK75 utilizes 4 CREE XM-L2 U2 LEDs to provide up to 4,000 lumens. The TK75 is powered by 8 CR123A batteries or 4 18650 rechargeable Li-ion batteries. To use the 8 CR123A batteries you will need to purchase an extension tube to house the extra batteries. The high powered LEDs with the TK75 provide a beam distance of up to 2,133 feet with a beam intensity of 105,600 candelas. Made from aircraft grade aluminum with a type III hard anodized finish the TK75 offers users a sturdy and durable light. The IPX-8 rating allows the light to be fully waterproof for 30 minutes in up to 6.5 feet of water.


  • Overheat protection
  • Amazing throw
  • Can add battery extensions
  • Low voltage function
  • Reverse polarity protection


  • Doesn’t come with a charger
  • Batteries must be removed before charging
  • Case is very lightweight


  • Weight: 18 oz. without batteries
  • Dimensions: 7.3 inches long with a 3.4-inch head diameter
  • Output: 35 to 4000 lumens
  • Runtime: 270 hours on low; 1 hour 40 minutes on Turbo

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Features & Benefits

Dual Body Switch

The Fenix TK75 doesn’t use a tactical tail cap switch. The TK75 uses a dual body switch to control the light. The dual body switches are located near the head of the light for quick access. The switch on the right powers the light and switches output modes. The function switch is on the left and provides instant access to burst or strobe mode.

Digitally Regulated Output

Fenix TK75 dual switch

One downfall to high powered flashlights is the output fluctuation. When using a flashlight, users want something that provides constant brightness. Fenix uses a digitally regulated output to maintain constant brightness. With the TK75 even as the battery is being drained of power the light output will remain steady.

Multi-function Socket

One of the features that makes the Fenix TK75 stand out is the multi-function socket. The multi-function socket allows users to turn the handheld TK75 into a portable or mounted light. The socket allows the attachment of a strap to allow easy transportation of the light. The tripod attachment turns the light into a hands-free tool.

Social Proof

I have spent several hours online reading through TK75 reviews from reputable sites. Before reading these reviews I already had a good impression of the Fenix TK75. It is a light that I would recommend to others. I am happy to report that majority of the reviews that I read shared the same opinion. Reviewers from all over have nothing but positive things to say about the Fenix TK75. Belonging to Fenix’s tactical line the TK75 offers versatility and power when you need it most.

Even with all of the positive reviews, the Fenix TK75 isn’t without its flaws. One of the biggest complaints with the light is how it can get hot to the touch. With the light-emitting 4000 lumens on Turbo, though, you have to expect it to generate some kind of heat. The other complaint that I saw was with the side buttons. Not everybody feels the dual buttons are easy to use.


Jetbeam T6

Jetbeam T6 LED Flashlight-Searchlight -Beam Distance: 750 meters

With the Jetbeam T6, users can expect up to 4,350 lumens of light utilizing a CREE XP-L LED. The Jetbeam T6 offers a maximum beam distance of 2,460 feet with a peak beam intensity of 119,500 candelas. With the Jetbeam T6 users have the choice between 4 brightness levels ranging from 30 to 4,350 lumens. The T6 features 3 special tactical modes: strobe, SOS, and beacon. The light is controlled via dual side switches. The aero-grade aluminum alloy body has an anti-roll design. The Jetbeam T6 is impact resistant up to 5 feet. The Jetbeam T6 is a great choice for those who want the same features the Fenix TK75, but need a brighter light.

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Nitecore TM16

EdisonBright Nitecore TM16 4000 Lumen CREE LED Tiny Monster Flashlight, D4 Smart Charger, 4 X Nitecore NL189 18650 3400mAh AA Alkaline Batteries Sampler Bundle

Like the Fenix TK75, the Nitecore TM16 utilizes 4 CREE XM-L2 U2 LEDs to emit up to 4,000 lumens of light. With the Nitecore TM16 users have the option of 5 brightness levels that handle a lumen range of 5 to 4000. On the lowest setting of 5 lumens, you can expect a runtime of 520 hours, while Turbo will only last for 45 minutes using 4 18650 batteries. The Nitecore TM16 offers 3 hidden modes: location beacon, strobe, and SOS. The various output modes make it a great choice for various outdoor activities. The Nitecore TM16 is a great choice for people who want the brightness of the Fenix with the extra modes.

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Thrunite TN40S

ThruNite TN40S V2 Flashlight 4450 Lumens Max 1151 Meters Adopted 4 x CREE XP-L HI LEDs Combo of Thrower & Flood (Cool White) CW

Although the Thrunite TN40S isn’t quite as long as the Fenix TK75, it is still an excellent alternative. The Thrunite TN40S is just less than 7 inches long, where the Fenix TK75 comes in a little over 7 inches. The Thrunite TN40S offers four main brightness levels, plus Strobe and Firefly mode. The Thrunite TN40S is a great choice for those who need a brighter light, as the TN40S emits up to 4,450 lumens on Turbo. The brighter light reaches further than the Fenix TK75 as it boosts a maximum beam distance of 3,776 feet. The Thrunite TN40 is a great light for those who want more than what the Fenix TK75 can offer.

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Fenix TK75 Final Thoughts

Let’s face it we all want a light that we can rely on when we need it, but it’s even more important in emergency situations. The Fenix TK75 provides users with a true tactical light they can always depend on. The powerful light is not only built tough, it is versatile enough to be used in a variety of applications. With up to 4,000 lumens on Turbo mode and a beam that can reach up to 2,133 feet, the TK75 is powerful enough to light up the darkest night. We know there are several lights on the market similar to the TK75, but not all of them meet our high standards of expectation. Now that you know just what the Fenix TK75 has to offer, go on out and purchase one today!

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