This Replacement for Venture MH400W/HBD/ED28/PS is a 400W pulse start metal halide HID lamp designed for powerful, reliable performance in commercial and industrial lighting applications. Featuring an E39 mogul base and ED28 clear glass bulb, it installs easily into compatible fixtures using an M135 ballast system. Delivering approximately 44,000 lumens of 4000K bright white light, this lamp provides strong, consistent illumination ideal for warehouses, manufacturing facilities, gymnasiums, and large-area lighting. The HOR/BD burn position ensures proper operation in approved horizontal or base-down fixtures. Engineered for dependable performance and high light output, this HID replacement bulb offers efficient operation and reliable illumination in demanding environments.