Philips. Quality specifications for high-pressure sodium vapour discharge lamps: SON plus 100 W. LE 1690
Philips. Quality specifications for high-pressure sodium vapour discharge lamps: SON 50 W " I". QLE 1533
Philips. Quality specifications for high-pressure sodium vapour discharge lamps: SON 70 W " I". LE 1534
Philips. Quality specifications for high-pressure sodium vapour discharge lamps: SON 150 W. LE 1536
Philips. Quality specifications for high-pressure sodium vapour discharge lamps: SON 250 W. LE 1538
Philips. Quality specifications for high-pressure sodium vapour discharge lamps: SON 400 W. LE 1539
General Electric. Lamp Catalog
Philips. Ballast and electronic ignitors for high-pressure sodium lamps
Tungsram. Lâmpadas de descarga
General Electric. High Pressure sodium lamps
Philips. High-pressure sodium-vapor discharge lamps SON
Philips. Low-pressure sodium lamps SON