straight from the www site...
*edit*
Oops I posted the older L1D specs as one member noted. There is a Q5 version thats brighter.
L1D-CE
-Cree 7090 XR-E LED
Two modes of output, selected by turning the bezel:
-General Mode: 9 lumens (25hrs) -> 40 lumens (5hrs) -> 80 lumens (2hrs) -> SOS
-Turbo Mode: 90 lumens (1.5hrs) -> Strobe
13 days of survival use (2 continuous hours per day on the lowest setting)
-Digitally regulated for constant brightness
-Uses one 1.5V AA ( Alkaline, NiMH, Lithium ) battery (not included), inexpensive and widely available
-9.7cm (L) x 2.1cm (D)
-Made of aircraft-grade aluminum
-Durable Type III hard-anodized finish
-48.2-gram (excluding batteries)
-Water-proof to IPX8 standard
-Toughened ultra clear glass lens with AR coating
-Reverse click, Push-button tail cap switch
-Capable of standing up securely on a flat surface to serve as a candle
-Includes a holster, a lanyard, two spare o-rings, and a rubber switch boot
L1T
-Cree Q2 LED with lifespan of 50,000 hours (Cree XR-E)
-Two digitally-regulated output levels, selected by turning the bezel
-High level: 98 lumens, 1.5 hours (Ni-MH)
-Low level: constant 16 lumens, 15 hours (Ni-MH)
-Operates on one 1.5V AA (Alkaline, Ni-MH, Lithium) battery (not included), inexpensive and widely available
-Dimensions: 9.4cm (L) x 2.1cm (D)
-Weight: 45g (excluding batteries)
-Aircraft-grade aluminum body with durable type-III hard-anodized finish
-Toughened ultra-clear glass lens with anti-reflective coating
-Textured reflector for a flawless beam
-Waterproof to IPX-8 Standards
-Forward momentary click switch, that protrudes from the tailcap, negating tail-stand abilities
-Included holster, lanyard, two spare o-rings, and extra rubber switch