This Osram Vialox NAV-T Super 4Y high-pressure sodium lamp offers enormous power and energy savings with a very long life of 32,000 hours. It emits an extra warm white light with a color temperature of 2,000 Kelvin. The lamp is dimmable with conventional or electronic ballasts and has a lifespan of up to 4 years, assuming 11 hours of burning time per day. It provides optimum energy efficiency when operated with POWERTRONIC PTo 3DIM ECGs. The lamp is intended for outdoor use only in suitable luminaires. Application areas include street lighting, parking lots, parks, bridges, and industrial plants. This specific model features a 400W power output, a white color family, and an A++ energy efficiency rating.