High-pressure sodium lamps provide the highest luminous efficiency of all high-pressure discharge lamps. They are the most economical light sources in general lighting.
Nominal wattage 50 W Rated wattage 50 W Lamp current 0.77000 A Nominal voltage 85 V Ignition voltage 1.8 / 5 kVp Rated lamp efficacy (standard condition) 72 lm/W
Rated luminous flux 3600 lm Color rendering index Ra ≤25 Color temperature 2000 K Rated LLMF at 2000 h 0.91 Diameter 71 mm Length 156 mm Maximum permitted outer bulb temperature 310 °C Maximum permitted base edge temperature 210 °C Lifespan B50 24000 h Lifespan B10 13000 h Lifespan B5 9000 h Operation mode LLMF/LSF 50 Hz Base (standard designation) E27 Design / version Coated Lamp mercury content 19 mg Dimmable Yes Burning position Any Enclosed luminaire required No Energy efficiency class A Energy consumption 55 kWh/1000 h
Benefits • High luminous efficacy
Areas of application • Streets • Outdoor lighting • Industrial installations • Suitable for use in open and enclosed luminaires • Outdoor applications only in suitable luminaires