Multibiker, that is some amazing light output from the dual 1W Luxeons. I'm considering buying some flashlights on eBay that use 3W Luxeon emitters, and then modify them for use as headlights. Mine will be 20 lumens brighter for each emitter, I'm realling looking forward to seeing how bright they'll be!

Also, about the heatskinks, are those really necessary? If I'm using 3W emitters, I can't help but wonder if the body of the flashlight will get super-hot. I'll have to do some calculations when I get home based on their datasheets to see how much modification will be required to the flashlights. Apparently you can run the 3W lamps without a heatsink at 100mA, but you only get a fraction of the maximum 65 lumens. Running at 700mA, they will surely dump a whole lot more heat! I hope I don't have to attach any heatsinks......