4Sevens continues to be a standard setter in the world of high performance, multi-mode portable lighting products. A great representation of this is the Quark AA2 Tactical light reviewed here. It has an amazingly clean beam that throws very efficiently (and far for an AA torch) and kills the competition in terms of cleaniness, lack of artifacts, and concentricity. It is effective to about 50 (maybe 75) yards when detailed indentification is needed. Put that beam in a durable 6061 aluminum body that wears a Type III hard anodizing that features IPX-8 waterproofing. Proven in my own extensive water testing, I found the Quark AA2 Tactical to be extremely waterproof with no failures noted (even in open water testing to about 25 feet). Weight on the AA2 Tactical will vary from a very light 3.2 ounces to 4.0 ounces depending on the type of cells. It is extremely portable and will fit into just about any POU. The Quark AA and 123 series utilize a common emitter head and tailcaps which also can be interchanged with each other (and ordered separately) to create your own lights...very cool. Burn times and brightness levels achieve excellent capability for the utilized emitter heads (XP-E R2 LED version reviewed and tested, XP-G R5 version referenced and current as of Mar 2010): Moonlight mode @ 0.2 lumes for 30 days, Low @ 3.5 lumens for 5 days, Med @ 18 lumens, High @ 70 lumens for 5 hrs, Max @ 170 lumens (R2 version, 206 lumens R5 version) for 1.3 hours (2.5 hours R5), Beacon ...
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