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 400 W Rated wattage 400 W Lamp current 4.45000 A Nominal voltage 105 V Ignition voltage 4 / 5 kVp Rated lamp efficacy (standard condition) 123 lm/W
Rated luminous flux 49000 lm Color rendering index Ra ≤25 Color temperature 2000 K Rated LLMF at 2000 h 0.97 Diameter 23 mm Length 206 mm Light center length (LCL) 103 mm Maximum permitted outer bulb temperature 650 °C Maximum permitted pinch temperature 250 °C Lifespan B50 24000 h Lifespan B10 16000 h Lifespan B5 12000 h Base (standard designation) Fc2 Design / version Clear Lamp mercury content 24 mg Dimmable Yes Burning position p45 Enclosed luminaire required No Hot restart Yes Energy efficiency class A+ Energy consumption 440 kWh/1000 h
Areas of application • Industrial installations • Car parks, courtyards • Buildings, monuments, bridges • Suitable for use in open and enclosed luminaires • Outdoor applications only in suitable luminaires
Features • Lamp survival factor: 95% after 12000 hours burning time