Peak LED Logan Lights
Peak LED is not a well known name in flashlights. They are an American manufacturer located in Arizona. I recently acquired a couple of models to test; the Logan series. The Peak Logan flashlights are single cell pocket or keychain sized flashlights using Cree XPG LED emitters. Peak advertises a maximum output of 300 lumens depending on the battery. The models tested both have LED emitters with a warm tint which reduces the output a bit.
The Peak Logan series is modular, meaning you can swap the bezels with different sized bodies for different types of batteries. The two models I tested included the 123 model, for CR123A or RCR123A batteries, and the 17500 that uses 17500 rechargeable batteries. The 17500 also has adapters and spacers available to use AA, CR123A, and RCR123A batteries.
The 123 model is 3" long and approximately 3/4" in diameter. The 17500 model is about 3.5" in length and the same diameter. As I said previously, either style body will use the same head so that by purchasing both bodies, you can use a variety of batteries.
The Peak Logan series come standard with a lanyard ring installed on the butt. A short version is also available with a flat butt the reduces the overall length for discreet pocket carry.
An interesting feature of the Peak line of flashlights, the Logan series included, is that they are available made of brass, stainless steel, or hard anodized aluminum. The ones I tested are made using a stainless bezel and hard anodized body.
What really makes these lights stand apart is the use of a technology named QTC - Quantum Tunneling Composite. QTC consists of what Peak calls a metallicized rubber pill that conducts high amounts of current the more it is compressed. In the Peak Logan series, the QTC pill is sandwiched internally between the butt of the flashlight and the battery. The flashlight is activated like the other Logan non-QTC lights, by turning the bezel. As the QTC compresses, the output increases.The Logan QTC is, therefore, a non-electronically infinitely adjustable output flashlight.
As an option, the Logan QTC is available with a push-button tail switch. The switch is also available separately to retro-fit existing lights.
Now that we've gone through the specs, lets get down to the review. I've found the infinite output adjustment to be a great asset for everyday carry. It allows the user to select only as much light as needed to accomplish the task at hand. It also helps to prevent loss of night vision if you need some light after dark. The push-button tail switch operates similarly. Pressing the tail switch gently produced a small amount of light. Pressing it all of the way in maximizes the output.
The Peak emitters produce a focused beam with little flood. The main criticism I have of the beam is that the hot spot is not well defined. It appears like the beam has a primary hot spot, a less refined secondary hotspot, and then a small amount of flood.
My biggest complaint is regarding the push-button tail switch. It does not operate as easily or as smoothly as we are use to on Surefire flashlights, for example. Pressing the switch, there is a small amount of take-up before it begins compressing the QTC pill. Once the switch contacts the QTC pill, much more pressure is required to activate the light. With some practice the system is useable. The biggest downside that I can find is that it's possible to outrun the QTC pill if pressing the tail switch in a strobing fashion. Practically, however, I can't think of a time when I would ever need to press the switch that fast.
From a usability standpoint, I prefer the length of the 17500 body. I find that the shorter 123 body barely fits in my hand and I have to pay attention not to block any of the light with my pinky finger while pressing the switch with my thumb.
Overall, the Peak Logan series seem to be great flashlights. I hope to see the QTC technology continue to advance so that it's more responsive. I'd also like to see it used in a two cell light. The new technology is exciting and I feel that it's a step in the right direction.