E27 50W-70W Vialox NAV-T High-pressure sodium vapour lamp - OSRAM brand Product benefits - Dimmable on conventional ballasts and electronic ballasts - Optimum energy efficiency when operated on POWERTRONIC PTo 3DIM EBs - Up to 25 % longer life than standard lamps - Greater reliability than standard lamps - Up to 20 % more luminous efficacy than standard lamps - Larger pole spacing possible than with standard lamps - Better lumen maintenance than standard lamps Higher reliability than standard lamps - Up to 20 % more luminous efficiency than standard lamps - Larger pole spacing possible than with standard lamps - Better lumen maintenance than standard lamps - Four-year replacement cycle Areas of application - Industrial facilities - Roads - Tunnels, Subways - Car parks, courtyards - Gardens, parks - Buildings, monuments, bridges