This all-LED headlamp offers extreme brightness and beam distance that rivals the high output typical of incandescent halogen and xenon bulbs. The Yukon HL features a MaxbrightÊ LED and 3 Ultrabright LEDs. Switch to the 3 LED mode when you require long burn time, and use the 1 watt LED for spotting at a distance. By using an all LED system, you eliminate the concern of bulb failure. The compact battery pack is mounted onto sturdy elastic webbing that offers ample adjustment for a comfortable fit.