Philips Lighting MH400/U :: Metal Halide Lamp, 400W, ED37 :: PLATT ELECTRIC SUPPLY
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
Sylvania 64490 4-Pack M400/U 400-Watt Metal Halide HID Light Bulb, 4000K, 36000 Lumens, E39 Mogul Base - Walmart.com
GE Lighting Metal Halide Light Bulb, ED37 Outdoor Light Bulb, 400-Watt, 36000 Lumen, E39 Mogul Base, White, 1-Pack, Multi-Vapor HID Light Bulb, High Intensity Discharge - High Intensity Discharge Bulbs - Amazon.com
AgroMax 400 Watt Metal Halide Bulb - 6500K Ultra Blue | HTG Supply