High-pressure sodium vapor lamps for open and enclosed luminaires. Product features: Provides light for the photosynthesis in plants. Photon flux: > 90 % after 12,000 h. High-pressure sodium lamp especially for greenhouse lighting. Product benefits: Shorter production times. Control over blossoming. Areas of application: Greenhouses. Suitable for growth of fruit due to emission of photosynthesis optimised light. Application only in suitable luminaires.