Can't decide between the power of xenon lamps and the run times of LEDs?
The XPG N-series provides the best of both worlds with its Ultra Definition Illumination LED bulb. The textured-nylon body is sealed with an O-ring for moisture protection, and the light is activated via a two-stage tailcap.
The N6 shown provides 18 lumens for 16 hours on two CR-123 batteries (included). Weight is 3.2 ounces. $50.