It is the same led and battery, and the same brightness.(as the origional Photon II) Basically it has a sort of "turtle neck" that goes up around the LED so it doesn't shine off to the sides, this is nice because it doesn't shine back in your eyes. It also has a "quick change battery compartment" It is definetly better than the tiny screws, and once the unit is open it doesn't fall all apart since the turtle neck is holding the led in place above the batteries. I like the inporvement, although you loose the switch to keep the unit on all the time. Ted, was that you that mentioned a tiny spring clip to keep these units on? That would be one way of doing it, although I only use these light intermittently so it is fine for me.
[This message has been edited by Brock (edited 08-17-2000).]