Cooper Lighting 8449D40G37 High Presure Sodium Magnetic Ballast 120-277V, 400W - Walmart.com
S400ML5AC4M-500K HIGH PRESS SODIUM MAG BALLAST KIT 400W, 480 VAC, 60 HZ : IRONTIME SALES INC.
Universal Lighting Technologies M400MLTAC4M500K Magnetic Core and Coil Ballast, Metal Halide, 400W, 120-277V: Led Household Light Bulbs: Amazon.com: Tools & Home Improvement
400W magnetic ballast | Caluma
Superplant - 400W - MAGNETIC BALLAST WITH FUSE HPS/MH
GE Magnetic Ballast, High Intensity Discharge Magnetic Ballast, Multi-Volt 5 Ballast (1 Pack) - Incandescent Bulbs - Amazon.com
Advance 71A6051-001D - Metal Halide Ballast - 400W | Energy Avenue