Princeton Tec Apex 200 Lumen Headlamp is perfect where lightweight is a must, ultimate power and function are a demand, and durability is an expectation. The Princeton Tec Apex Pro is powered by 2 CR123 lithium batteries protected in a highly durable and waterproof case. Designed for professionals, and perfect for all users. Ideal for climbing, paddling, caving, camping and work. This flashlight beam pattern combines focused narrow and focused wide beams to allow for the most versatility. At close range, the focused wide light beams simulate normal daylight conditions so you can take advantage of your peripheral vision. Princeton-Tec lights that feature regulated LEDs bulbs have a sophisticated regulating circuit that maintains initial brightness as long as the CR123 batteries have sufficient voltage. Traditional flash-lights are very bright initially, but immediately begin to dim and continue to dim until the batteries are drained. Constant Brightness is a term used to describe products that have regulated LEDs. The focused narrow beams create a long-throw spotlight ideal for night hiking and search and rescue. Like the Apex Pro 130Lumen version, athletes and adventurers around the world have marveled at the power of the Apex by Princeton Tec. In an effort to meet their unique and ever evolving needs, they have developed the Apex Pro to provide a faster and lighter option while still providing the ultimate flashlight in brightness and output.