Note: The Fenix LD15 used in this review is a "Testing Sample". Final production version may have changes implemented.

Compact and simple, that seems to be the design influence which lead to the production of the LD15. The head has as smooth bezel up the front, behind which sits a toughened AR-coated glass lens. The aluminum reflector is lightly textured and has a well-polished surface finish. The LED sitting at the bottom of the reflector cup is a bit off-center upon visual inspection. On its exterior the head simply has a band of knurling running all around which provides adequate grip for activation and mode switching. Nice touch since the LD15 is a twist activated light. The LED module itself seems to be encased in a brass sleeve, with a rubber washer on the rear end which serves as a reverse polarity protection in case a battery is inserted in reverse.

The entire LD15, apart from the LED module casing, is coated in durable black Type 3 anodizing. Threads on the front mate with those on the head nicely. Continuing the design style of the head, the battery tube has no other fancy design elements aside from being almost completed covered in knurling. This knurling is fine-grained, not very rough so no worries about having it rubbing up against other stuff in your pocket. The battery tube itself is very light weight, which also means that it has thin walls. Depending on your usage, this may or may not be an issue. The "-" contact point for the battery inside the battery tube has spring-loaded contact points and foam washer wish helps reduce battery rattle. Towards the rear end the batter tube has a slightly raised lip which has two holes for lanyard attachments. The LD15 can tail stand without problems.

If you're unfamiliar with any of the terms used in this review, click here for explanations on common flashlight related vocabulary.

As mentioned earlier, the LD15 was designed with simplicity in mind, but it's still versatile enough to be a good EDC option. Two output modes are available Low and High. Cycling through them is done by switching the light off and on within 1.5 seconds. The LD15 doesn't have a memory feature so leaving the light off for anything longer than 1.5 seconds will revert the next activation to the default Low level first. I mentioned earlier that the LED is slightly off-center but looking at the beam profile, it doesn't seem apparent at all. The medium sized hotspot produced is focused well and not skewed at all. The soft corona around tapers off to a pretty usable spill beam. Beam profile is clean with no noticeable artifacts. Beam color temperature on this sample falls just slightly on the cool side of white. Judging from the runtime graph below, it seems that Fenix has implemented new electronics driving the LD15. The result is regulation and runtime performance is really very good. Measure overall output was exactly 100 lumens, which is slightly lower than the advertised 117 lumens.

The Good - Solid runtime and regulation. Simple, clean design and interface. Choice of Low and High levels make it versatile for most indoor situations.

The Bad - Nothing significant.

The Relative - Clean beam profile. Just slightly cool color temperature. Utilizes a twist switch. Is able to tail stand.