Aura Crystal EP Long Life can be used to replace High Pressure Sodium lamps, which give a yellow light and low colour rendering. Aura Crystal EP Long Life is designed for use in both closed and open luminaires. The lamp is developed to operate with magnetic ballast and separate ignitor. This includes the functionality of step down switching to 50% power. The use of specified electronic ballasts is possible, also dimming according to the defined lighting levels of the electronic ballasts.