The need for high-pressure sodium ballast classification

American National Standards Institute (ANSI) standards for high-pressure sodium lamps, including draft for 250-W lamp.

Unglert M. C. , and Kane R. M. , “The interaction of high-pressure sodium lamps, ballasts and luminaires,” Lighting Design & Application, Vol. 10, No 11, November 1980, pp. 43–47.