2010NEMA ANSLG C82.9-2010 American National Standard for Lamp Ballasts- High-Intensity Discharge and Low-Pressure Sodium Lamps- Definitions
NEMA ANSLG C82.9-2010 American National Standard for Lamp Ballasts- High-Intensity Discharge and Low-Pressure Sodium Lamps- Definitions was changed to NEMA C82.9-2016 Lamp Ballasts - High-Intensity Discharge and Low-Pressure Sodium Lamps - Definitions.