The dual beam Specialized Flux 1200, with seven different operating modes, gave us plenty of confidence to see and be seen on our dawn patrol rides. The variety of mounting options (GoPro mount shown) provided for placement on our bike helmet or direct attachment to any of our test bikes. One LED has a broad illumination pattern while the other has a brighter, focused beam pattern. We frequently used both light sources simultaneously to provide the best illumination possible in low-light conditions. On the brightest setting, we experienced over 65 minutes of runtime, and while in the lowest strobe setting, we went about 12 hours between charges. Plus, we never had to activate the emergency reserve power mode (yes, this Specialized headlight has that feature!).