Osram M400/TRI Magnetic Ballast 120/277/347V for 400W Metal Halide Lamp : Amazon.ca: Tools & Home Improvement
Ultrasave Ballast HD400-Q-M59(KIT), Regular Start Metal Halide 400W Ballast,ANSI M59 ultrasave hd400-q-m59(kit) 400w regular start magnetic metal halide ballast 120/208/240/277v quad-tap cap-24 400 watt pulse start ballasts ultrasave hd400-q-m59(kit) 400
Plusrite BALU400-CWA-V3 HPS Magnetic Ballast [#1 in Lighting] | Lumenco.ca
HID Magnetic Ballast 70-400W
250W/400W Electronic Magnetic Ballast (PHLPS DESIGN) (COPPER OR ALUMINUM FOR YOUR CHOICE) - China Electronic Magnetic Ballast, Aluminium Ballast | Made-in-China.com