TK75 Review

Everything you could need to know about the Fenix TK75

tk75 lumen levels

Power / Design

The first thing people notice about the TK75 is the 2,600 lumen rating. As you can see above: compared to 18 lumens, 2600 lumens is quite a contrast. In such a compact package it’s quite impressive. This is done using Cree XM-L LEDs and 4 lithium batteries. New glass allows even more light to escape enabling the TK75 to achieve even higher levels of brightness. Although the glass is very clear, at high levels of brightness it’s easy to see dust on the glass and a clear outline of yellow color emitted by the LED’s.

tk75 glass

Although the flashlight should have 4 18650 batteries, it can run on only two in the case of emergencies because of the 2S2p battery pack configuration. To get only two batteries to work you just need to put one cell on either side of the larger triangle mark on the side of the cell holder. Another way to think of this is you need one cell facing each way and both same side of the holder.  The reason that it’s not recommended to run the light regularly on only 2 cells is because the higher current rates put more strain on the lithium cells.

battery carrier


The TK75 beam has a flower shape. It’s mostly that flower shape that extends the flood to make it even a wider angle than the TK45.

TK75 vs TK45

Although the beam is wider than the TK45, it’s able to throw a much further distance. The beam throw on the TK 75 is 606 meters compared to the 45’s 200 meter throw. Besides the extremely clear glass, the light utilizes an extremely smooth reflector to reflect as much light as possible, making the light incredibly efficient.


Fenix tk75

Some users don’t like the yellow color of the hotspot. Some more sensitive to beam color might say it’s rather green. Compared to other LED beams it appears more yellow in my opinion.

Some users have reported fogging of the glass in extremely cold weather. This is due to the air outside of the flashlight condensing the moisture within the flashlight against the thin glass. One possible solution to this problem is placing silica gel in the battery holder and sealing it away in the light so that it can pull moisture out of the head. Changing the batteries in a cold & dry environment will help keep moisture from entering the flashlight.


Silica Gel

3 Responses to “TK75 Review”

  1. Hi. I’m just a concerned customer, who wants to get what i paid for…
    I mean the quality of the light of course… There are lots and lots of posts and whole threads on forums worldwide, where people complain about manufacturing of the light.
    For example, mine 75th has 2 non-centered LEDs of total 3, not centered light beam, and at least 3 pits (dents) on a surface of a reflector.

    If you are going to buy one, make sure that your dealer will be able to replace it if something is wrong…
    Mine dealer wasn’t the kindest person. I kindly asked him to replace it and received his answer: “send the light back, and try to find the one you need”, “i won’t be sending you flashlights for testing because of your *high quality standards*.”

    Well, beware… Good luck with your light…

  2. The beam tint on the TK75 is definitely a little yellow but certainly not as green as some lights can be.

    The Olight S10 is a big example of a “GREEN TINTED BEAM” and to a lesser degree so is the Olight S20.

    Thanks for the TK75 review, keep up the good effort.

    Beam shots of the bush with measured targets, golf links with markers or a local factory area taken from a good vantage point is a lot better way to show most of us flashaholics what is happening in the real world with any flashlight comparison.

  3. mine is perfect!

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