The SureFire E1B Backup was designed to be used by law enforcement professionals as an auxiliary flashlight. The Backup utilizes a MaxVision Beam reflector to shape the powerful 400 lumen beam with an illumination distance of up to 86 meters. Alternatively, the Backup has a secondary output function that produces a more mild beam of 5 lumens, perfect for situations that don't require intense illumination or for greatly preserving the battery life.