The high pressure sodium lamps consist of a clear tube-shaped outer balloon made of hard glass and a tube that neutralizes made of sinted aluminiumoxide and an integrated antenna. The neutralizing tube is filled with fossil gasses and a certain dosage of natrium under high pressure. The fossil gas is a starting gas in the process of neutralization and contributes to the light during the burning of the gasses. The antenna ensures less premature failure, greater reliability and elongation of the life span of the service.The zircon/aluminium getter ensures improved light production and greater reliability. Application Assimilation lighting Qualities Meant for the improvement of the CO2 assimilation for a bettered photosynthesis and growth of the plant. We recommend that lamps are replaced every 12 to 14 months, after 14 months there is an appreciable drop in the lumen output leading to a reduction in crop yield.