This is an Osram NAV-TS 400w high pressure sodium Lamp. The lamp has an average life of 24,000 hours. Areas of application include industrial installations, car parks and court yards, Buildings, monuments, bridges and is also suitable for use in enclosed and open luminaires. This lamp can be made dimmable if used with conventional and electronic control gear. The lamp comes with an Fc2 cap and is available in colours 2000k. Dimensions & weight Diameter 23.0 mm Light center length (LCL) 103.0 mm Length 206.0 mm