This manual has been designed to help traffic accident investigators and reconstructionists meet the high standard of performance and expertise necessary to determine vehicle lamp status for “on” and “off” conditions at the time of a vehicle collision. Each chapter provides clear definitions of and statements about the topics it contains, with graduated commentary arranged so as to present a natural development and understanding of the chapter subject matter. A number of working hypotheses using examples and photographs are provided to assist the examining technician or analyst in the interpretation of items of evidence that might be presented. The text discusses examining the vehicle for exhibits, the precautions that must be taken in collecting and preserving evidence, lamp identification and analysis, hot and cold shock analysis, packaging and transferring exhibits to the forensic science laboratory, and the mistakes that are inherent in investigations and how to avoid them. In addition, the application of physics and vehicle behavior in relation to lamp damages is thoroughly discussed. The book has been written in a clear and concise style that is further enhanced by the liberal use of illustrations. It has been designed not only for use as a handy reference manual but also to be of assistance as a training manual for use in police training schools that include lamp examination as part of their curriculum. In addition, the text will be useful and practical for investigators, forensic technicians, attorneys, insurance investigators, and judges.