The Apex Headlamp is the brightest headlamp in Princeton Tec's professional series, and a favorite among extreme outdoorsmen and cavers. It features a waterproof construction and an LED capable of powerful spot beam or bright flood with two switches, making changing modes intuitive. Headlamp lumens: 260 1 Maxbright white LED 4 ultrabright white LED's 4 AA batteries included 150 hours burn time