Simply Conserve Corn Cob 16800 Lumen EX39 Base 400-Watt EQ ED17 Daylight Ex39 LED Light Bulb (2-Pack) in the General Purpose LED Light Bulbs department at Lowes.com
Light Efficient Design 120W LED - Replaces 400W HID - 9929 Lumens - E39 Base - 4000K - UL Type A | ProLampSales
How To Retrofit Your 250W Metal Halide Flood Light Fixture Using LED Corn Lights! - YouTube
LED Retrofit for Metal Halide - 400W
400W Low Bay Retrofit LED Bulb - 130 Watt - 16,000 Lumens - 4000K Cool White - Replaces 400W Metal Halide Bulb - Ballast Bypass
LED Retrofit Lamps for Metal Halide 400W Replacement
LED Retrofit Lamp for Metal Halide Fixtures|Lighting Supply Outlet
High Lumen LED Filament Bulb - 400W Equal - Mogul Base - TCP FED37N40050E39CL | CityLightsUSA.com
115 Watt - Arcana II Series - E39 LED Corn Bulb -14,900 Lumen - 5000K - Replacement for 400 watt Metal Halide