ANORDNING INNEFATTANDE ETT LAAGTRYCKSNATRIUMAANGURLADDNINGSROER OCH EN FREKVENSOMVANDLARE DRIVEN MED EN FREKVENS AV MINST 80KHZ

摘要

An arrangement including a frequency converter (4) and a discharge lamp (10) connected thereto wherein the frequency converter (4) is of a type whose output frequency is at least 80 kHz, while the lamp is a low-pressure sodium vapor discharge lamp. This lamp supply system provides a high luminous efficacy for the lamp.