Philips MH400/U 34415-0 Metal Halide Bulb | 400 Watt Metal Halide Bulb | M59/S | MH400/U
iPower 400 Watt Vegetative Metal Halide MH Conversion Grow Light Bulb Lamp High PAR Enhanced Blue and Violet Spectrums CCT 6000K, 400W, glass - Walmart.com
Southwire 400-Watt E39 For Indoor/Outdoor Use Metal Halide HID Light Bulb in the HID Light Bulbs department at Lowes.com