The Eos light takes self-contained battery lighting to the next level! The combination of a Maxbright LED and the Princeton Tec-designed optimized lens/collimator maximizes the beam by balancing long-throw with localized lighting. Recognizing that different amounts of light are needed for different activities, the Eos has been equipped with 3 brightness levels and a blinking mode; further ensuring that the Eos will remain at Constant Brightness as long as the batteries have sufficient voltage. The use of high-grade materials ensures durability and strong resistance to water/ weather/environment conditions. Power: 80 Lumens, Lamp: 1 Maxbright LED, Burn Time: 121 Hours, Batteries: 3 AAA Alkaline or Lithium, Weight: 105g.