The task in designing the LED optical unit was to find the optimal balance of brightness, heat dispersion, and reliability. 575 and FourSix headlamps are available with optional ThermoCool LEDs that have accumulated countless hours of testing and design. What you get is a rigorously tested LED optical unit designed to exceed 10,000 hours of run-time. With light output over 2x stock headlights, you'll get a boatload of crisp white light while saving more than 80% amperage draw compared to OEM sealed beams. Want even brighter lights? Upgrade to our 30W system with Active Cooling and boost your output!