The majority of crimes occur during the hours of darkness, and fully two-thirds of all shooting incidents in which police officers on duty are killed take place during hours of diminished light. The goal of this unique book is to increase officers' awareness that training in low-light and no-light conditions is necessary in order for them to prevail in such situations, to help facilitate correct decision making under these conditions, and to help them understand the use of a myriad of illumination tools available for professional use today. Major topics include: (1) dim-light and no-light doctrine, including navigation techniques, threat location, threat acquisition, and threat identification; (2) flashlight doctrine, including many examples of engaging a threat using a flashlight; (3) low-light weapon sighting systems; (4) techniques used for signalling during dim-light and no-light conditions; and (5) illumination technologies supporting tactical and emergency operations, including infrared systems, thermal imagers, night vision systems, strobe lights, and lasers. Through the use of the techniques described throughout this unique and comprehensive book, the skill, professionalism, and ability of police officers to operate and survive in dim-light, no-light, and artificial light conditions will be enhanced