ROBERTSON 3P10004 AMH0100H04912 mHID, Ballast, Metal Halide, Pulse Start, 100 Watt (M90), HPF, 120/208/240/277Vac., 60Hz, Quad Tap, HX-HPF Ballast Kit Equivalent to: Philips Advance Philips Advance 71A5390, General Electric GEM100MLTLC3D-5 Equivalent to: Universal M100MLTLC3M-500K, Osram-Sylvania M100/Multi-Kit Equivalent to: Hatch GC100MLTHXCAK, Fulham HHMHMLT4100D, Keystone MH-100X-Q Two Year Factory Warranty-ONLY if the Amazon Seller is ROBERTSON Worldwide. Take advantage of ROBERTSON's 60 years of electronic design and quality manufacturing experience.