High energy efficiency low pressure sodium lamps for indoor and outdoor applications. High luminous efficacy leads to low energy consumption. Uniform sodium distribution in the discharge tube by means of dimples for a more stable discharge, higher efficacy and better lumen maintenance and lamp life. Monochromatic yellow colour with non-existent colour rendering. Application: Road lighting, railway marshalling yards and crossings, airports, harbours and docks, quarries, foundries and rolling mills. Security and orientation lighting.
