Princeton Tec Impact II Module The Impact II incorporates a proprietary optical lens system that projects a focused beam of Ultrabright LED light for 28 meters. The ergonomic design including a built-in utility clip makes the Impact II easy to handle. The Impact II is powered by 4 AAA Alkaline batteries with a burn time of over 75 hours of useful light. The rugged construction is sure to be reliable when you need it. Specifications *POWER 10 Lumens. *LAMP 1 Ultrabright LED. *BURN TIME 75 Hours. *BATTERIES 4 AAA Alkaline. *WEIGHT 81 Grams. *UL RATING APPROVED. * Class 1 Division 2 Groups A B C & D.