I found this tac light, made by Coast, which is headquartered in Portland. I only paid about $40 for it -- well worth every penny!
Coast Product Details
It uses three AAA batteries, has a momentary or click-on tailcap switch, and puts out 160 lumens! And . . . lasts more than 100 hours on a set of batteries. Incredible.
As a professional in the field of safety and security, I carry this light every day, and a spare set of shrink-wrapped batteries. Should we ever have the "big one" in Seattle (earthquake), I'm ready for four days of search and rescue. Or, many, many days of shooting bad guys in the dark!
Take a look at these lights -- I can't recommend them highly enough.