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
Plusrite 400W Clear BT37 Protected Cool White Metal Halide Bulb | MP400/BT37/BU/4K | Bulbs.com
Orein 400-Watt Equivalent ED37 Corn Cobb HID LED Light Bulb Daylight (1-Bulb) A837A400NDX3901 - The Home Depot
Feit Electric 400-Watt Equivalent Indoor Garage 4-Panel Foldable LED Light Bulb, 5000K Daylight (1-Bulb) ADJ8000/5K/LED - The Home Depot
HPI-T-400W PLUS Metal Halide Lamp | AAMSCO Lighting
Xtrasun Metal Halide (MH) Lamp, 400W, 7200K
Philips 274498 MH400/U | 400W M59/E Metal Halide Bulb
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
400w HPIT Plus Tubular Metal Halide Discharge Lamp 645 4500k Cool White [Giant Edison Screw - E40 - GES Cap] (Philips 400HPITPLUS VZ) - Amazon.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
Hortilux Metal Ace Conversion (HPS to Metal Halide) Lamp, 400W
Sylvania Led Desk Lamp 6 Watt 400 Lumens 3000K AC Plug In E22539 NIB | eBay
105 Watt Stubby LED Corn Bulb, Replaces 450 Watt HID, 15,750 Lumens, DLC Listed, ETL Listed, 50,000 Hours, 10 Year Warranty - LED Global Supply