GE 26435 400-Watt Metal Halide ED37 Mogul Light Bulb

The GE 26435 Multi-Vapor is a 400-watt metal halide lamp that produces 36,000 initial lumens at a 4,000K correlated color temperature. Compared to the amber monochromatic output of high-pressure sodium lamps, this bulb delivers full-spectrum white light that dramatically improves color rendering and visual acuity in commercial and industrial environments. The difference is immediately visible: signage becomes readable, product colors appear natural under retail lighting, and security camera footage captures usable detail. At roughly 90 lumens per watt, it is less efficient than an equivalent HPS lamp, but the qualitative improvement in light output often justifies the energy trade-off in applications where visibility quality matters.

The ED37 envelope with an E39 mogul base fits standard 400W HID fixtures, and GE positions this as a straightforward upgrade path from HPS — though ballast compatibility must be confirmed, as metal halide requires an M59-rated ballast rather than the S51 used for 400W HPS. The lamp is a point source, which means it works well in reflector-based fixtures that rely on optical control to direct light output. Warm-up time is 5-10 minutes with a 10-15 minute restrike delay, which is standard for metal halide technology. This lamp is built for warehouses, parking structures, retail big-box environments, sports facilities, and any large space where white light and high output are both required. As LED technology continues to advance, this lamp remains relevant for facilities with existing metal halide infrastructure that are not yet ready for a full LED retrofit.