Other LED Flashlight projects on the web... Answered
CandlePower Forums is a set of forums about assorted types of lights. Mostly flashlights of various sorts, including a great deal of info on LED flashlights and battery performance in flashlights.
Anyway, I found there this set of postings that make up a very nicely done ("Instructable class") tutorial on how to build a two-led light with "night glow" feature (several different versions, actually.) Worth checking out!