The RAB Lighting HIDFA-450S-EX39-8CCT-BYP/480V is a 450/338/225W LED post top HID replacement lamp with an EX39 mogul base, engineered for high-output ballast-bypass retrofit of large area and roadway luminaires on 277480V distribution systems. Three selectable wattage steps deliver 38,24473,158 lumens with field-switchable CCT (3000K/4000K/5000K), 80 CRI, and up to 160 LPW efficacy. Rated for 50,000 hours with a white finish, this lamp addresses large-scale municipal, campus, and industrial post-top retrofit projects where 480V infrastructure is standard.