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
GE 400w CMH Ceramic Light Bulb | HTG Supply
MPI 400W/BU/LU 400 Watt S51/O Metal Halide Retrofit Bulb – Green Electrical Supply
Philips 400W Clear ED28 Cool White Metal Halide Bulb | MH400/U/ED28 | Bulbs .com