This is the most popular flashlight found in homes, vehicles and used by law enforcement personnel and other professionals. The D-cell light includes two high intensity White Star Krypton gas lamps for enhanced brilliance and extended light range, a self cleaning rotary switch has three positions; on, off, and manual signal for momentary on/off. Never be without light with the spare lamp stored in the tail cap. The aluminum casing and O-ring seal make this light water resistance and they are made in the U.S.A.