Simply Conserve Corn Cob 16800 Lumen EX39 Base 400-Watt EQ ED17 Daylight EX39 LED Light Bulb (2-Pack) in the General Purpose Light Bulbs department at Lowes.com
Amazon.com : cdmall Full Spectrum LED Grow Light 400W for Indoor Crops Growing, AlphaPar New Tech LED Grow Lamp Board for Indoor Hydroponic Grow Veg and Flowers (APQ 400W) : Patio, Lawn
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
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
Simply Conserve Corn Cob 16800 Lumen EX39 Base 400-Watt EQ ED17 Daylight EX39 LED Light Bulb (2-Pack) in the General Purpose Light Bulbs department at Lowes.com
Philips 274498 MH400/U | 400W M59/E Metal Halide Bulb
Orein 400-Watt Equivalent ED37 Corn Cobb HID LED Light Bulb Daylight (1-Bulb) A837A400NDX3901 - The Home Depot
Satco Clear Heat Lamp for Chicks
Howard Lighting H33GL-400/DX 400-Watt ED37 Coated Mercury Vapor Mogul Base Lamp