The Osram Vialox NAV-E 400W Super 4Y is a high-performance sodium vapor lamp offering superior brightness, long life, and energy savings. Emitting a 2000K extra warm white light, it ensures excellent visibility and ambiance for outdoor and industrial settings. With a luminous efficacy of 135 lm/W and a rated life of 32,000 hours, it minimizes maintenance and replacement costs. It fits into E40 sockets and operates on conventional control gear with an ignition voltage range of 3.3 to 5.0 kVp. Ideal for professional use where dependable and efficient lighting is required.