The next headlamp
I'm probably going to go with Cree XR-E's, Q5 bin ... I'm torn as to whether I should run at 500 mA or 1000mA. These LEDs seem pretty amazing:
107 lumens at 350 mA
171 lumens at 500 mA
214 lumens at 1000 mA
compare that to my Luxeon I Stars:
45 lumens at 350 mA
At least on paper, thats waaaaay more efficient!
I also learned that "JB weld" is a good way to attach the star boards to the heat sink. Now I just have to round up another one of those!