The Westgate Mfg CL-FLT-54-75W-50K-E39 is a 180 flat LED HID retrofit lamp with an E39 mogul base, available in 54W, 63W, or 75W configurations delivering up to 150 lm/W at 5000K for high-efficacy HID fixture upgrades. Built with Bridgelux 3030 LEDs in an aluminum and polycarbonate housing, it operates on AC100277V, carries an IP64 rating, and is rated for 50,000 hours. UL and DLC listed with a 5-year warranty.