This Replacement for Venture Lighting MP400W/BU/ED28/UVS/PS/SHS is a 400W pulse start metal halide HID lamp designed for durable, high-output performance in commercial and industrial lighting applications. Featuring an E39 mogul base and ED28 bulb design, it installs easily into compatible fixtures using an M155 ballast system. Delivering approximately 41,000 lumens of 4000K bright white light, this lamp provides strong, consistent illumination ideal for warehouses, gymnasiums, retail spaces, and other large-area lighting applications. The UV-protected coated design helps reduce ultraviolet output and supports extended fixture and lens life. With a rated life of up to 20,000 hours, this HID replacement bulb offers long-lasting durability, dependable performance, and efficient operation for demanding lighting environments.