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This standard, produced by the ANSI Committee 136 for Roadway and Area Lighting, was last revised in 2003. It offers step-by-step guidance for use in troubleshooting HID lighting fixtures by technicians in the field. It addresses the commonly encountered problems of lamps that are on continuously, cycle on and off, do not start, or burn dimly. www.nema.org/stds/c136-26.cfm