Philips Lighting 232520 ED28 Standard Metal Halide Lamp 400 Watt E39 Mogul Base 44000 Lumens 68 CRI 4000K Cool White - High Intensity Discharge Bulbs - Amazon.com
Feit Electric 400-Watt ED28 Shape Clear Metal Halide High Intensity Discharge E39 Mogul Base HID Light Bulb (1-Bulb) MH400/U/ED28/HDRP - The Home Depot
Xtrasun Metal Halide (MH) Lamp, 400W, 7200K - Aroma Grow Store
PLATINUM M400/U lamp 400w MOGUL E39 base metal halide bulb - MH400 - Walmart.com
Ushio UMH-400/U Metal Halide Lamp (400W) 5000227 B&H Photo Video