It can do everything I described above and it does it with style-or at least the Ti version does. That makes the D25a light, for the first time I have found, a single cell AA light that, on high, hits an actual lumen rating at my preferred high output. After 90 seconds it drops down 20% to 98.4 lumens. Sure other lights had similar outputs (see: Nitecore D11.2), but this is the first (or one of the first) light to conform to the ANSI standard (which is a more rigorously defined measurement, requiring a specified output for a specified time measured from a specified distance). It also, probably, has to do with makers being a little optimistic, shall we say, in their lumens ratings.Īll this being said, I think that the EagleTac D25a series lights represent the first truly capable single cell AA EDC light. This has to do with the difference between emitter lumens and out the front lumens as well as the beam styles (which don't alter the lumens ratings, a measurement of total light output, but do change how bright our eyes see the light-a tighter beam is seen as brighter, it also throws farther). Some makers might claim 100 lumens or more, but the out the front numbers were significantly less, around 60-70 lumens, which while nice is not quite enough to light up somewhat far away objects. The issue with single cell AA lights is that up until very recently the 100 lumen high was not REALLY possible. I'd take 200 lumens on high, but that is not strictly necessary and something of a luxury. A light that could do that would handle probably 99.9% of all of your EDC tasks. This translates into a three tiered output of around 0.5-5 lumens on low, 20-40 lumens on medium, and around 80-100 lumens on high. This means you need a light that won't wreck your night vision, a light that has good flood and while bright, won't blind you, and a light that can light up an object 50-100 feet away. In reality most people need an EDC light to do three things: walking around at night, close up tasks in the dark, and shining a light towards a source of noise or movement that is well outside arm's reach. It has taken a while and there are few lights out there that handle this task well, but one that I really like is the EagleTac D25a. We have arrived at a point where emitter technology has made it possible to use a single AA cell as a primary EDC light. After a long journey of reviewing more high end or alternatively less readily available items, I have returned to the mainstream of EDC gear with this review-a single cell AA light.
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