LEDLENSER HF8R CORE HEADLAMPMAX 210 m MIN 25 m MAX 1600 lm MIN 20 lm MAX 90 h MIN 3. 5 h Regardless of what you need to accomplish before sunrise, after sunset, or in any dark situation Ledlenser makes it much easier when you are equipped with Ledlenser HF8R Core headlamp. Its innovative patent pending Adaptive Light Beam Technology allows automatic dimming and focusing, seamlessly adjusting the light output for the situation, so you can be totally hands free. It requires no