Sylvania 64046 250W Metalarc Mogul Base Halide Bulb

The Sylvania 64046 is a 250-watt metal halide lamp in the ED28 envelope with an E39 mogul base, designed for sustained, high-output commercial and industrial illumination. At 3800 Kelvin, it produces light that reads as bright white with a slight warmth — suited for large-area coverage in warehouses, manufacturing floors, parking structures, and exterior commercial fixtures. With an ANSI code of M153/E, it is compatible with a wide range of existing HID ballast systems, making it a practical replacement lamp for aging infrastructure where fixture replacement is not in scope. The CRI of 65 means this lamp delivers functional, adequate color rendering for most industrial and task environments, though it falls short of the CRI 80+ threshold recommended for retail or color-critical spaces.

Build quality is consistent with Sylvania's commercial Metalarc line — the lamp is rated for universal burn position, allowing installation in any fixture orientation without voiding performance specifications. Like all metal halide sources, the 64046 requires a warm-up period to reach full output and a cool-down period before hot restrike, which is a fundamental operating characteristic of the technology. The 12,000-hour rated lifespan positions it as a low-frequency maintenance item in high-bay or hard-to-access fixtures. Thermal management is handled at the ballast and fixture level — the lamp itself has no active cooling requirements beyond adequate fixture ventilation.