A 1AA tactical light is sort of a weird concept. In a high stress situation where you're illuminating something while aiming a handgun at it, you probably don't care even slightly about either runtime or about battery cost per hour, so tactical lights usually use CR123A's which are expensive but which have much more power density than AA's. Also, it's only been very recently (due to LED technology advances in literally the past year or so) that 1AA lights have been able to put out as many lumens as traditional 2x123-powered lights since the 1AA lights necessarily use a lot less power.
Basically, there are many 1AA lights that are absolutely wonderful as general purpose or EDC lights, but if you're serious about tactical applications, you probably want a 123-powered light, of which Surefire is still the premier brand.