More info on the Proton from the LRI forum ......
As for the specs, here's the preliminary numbers. Of course, final specs are subject to change but this should be pretty close. Total power draw at full brightness is 1.5W (1.3 amps drawn from the single AA), but some of that power goes to power the electronics so the LEDs don't see the entire 1.5W. Overdriven, the Nichia LEDs should be putting out about ~42Lm/W, which works out to approximately 59 Lumens @ ~250Cd from the 6 Nichia LEDs. In comparison, Luxeons end up at around ~30Lm/W plus a 20% loss from the reflector & lens cover. That works out to about 75% more light output from the 6 Nichias compared to a similarly powered Luxeon.
I should also note that the 45 minute run time is 45 minutes at *full brightness*, before the light begins to dim. David's been using 2500mah Energizer NiMH batteries for the tests so expect alkalines to give an extra 17% or so. Also, I don't know the details about exactly how the voltage control circuit works, but if it's anything like the Fusion, then Lithium AAs may be able to push the brightness up even higher.
Apparently the NiMH work better in this application than alkalines, so alkalines may not actually give much increased run-time over the NiMH after all. I have also been told that lithium AAs (with their higher voltage) should give a 20% boost in brightness over the NiMH. That would push light output up to nearly 71 Lumens @ 300Cd.
(Available) Within the next month or two. That's the closest estimate I have at the moment.