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Princeton Tec Apex has been upgraded to an amazing 275 lumens and a beam range of 120m. Being the biggest and brightest headlamp in the professional series, the Apex has been a favorite of extreme outdoorsmen and cavers for years. Truly the pinnacle of waterproof LED headlamp design, the Apex combines the qualities of both the Eos and the Quad. With a single Regulated Maxbright LED partnered with Four Regulated Ultrabright LEDs, the Apex provides either a powerful spot beam or a bright flood, and switching between the two is incredibly easy. Proprietary heatsink technology allows the LEDs to burn brighter and longer. The Apex is compatible with alkaline, lithium, and rechargeable batteries.