The brightest headlamp in our professional series, the Apex, has been a favorite of extreme outdoorsmen and cavers for years. The pinnacle of waterproof LED headlamp design, the Apex incorporates a single regulated Maxbright LED plus four regulated Ultrabright LEDs. The Apex is capable of a powerful spot beam or a bright flood, and two switches make changing modes intuitive. Proprietary heatsink technology allows the LEDs to burn brighter and longer. Specifications:• Power: 650 Lumens• Lamp: 1 Maxbright LED (regulated), (dimmable), 4 White Ultrabright LEDs (regulated), (dimmable)• Burn Time: 12 Hours• Batteries: 4 AA Alkaline or Lithium (Included) | Princeton Tec Apex LED Headlamp, Black/Grey - White | The House