ROBERTSON 3P10172 CMH0400H04912 M, Magnetic CWA HID Ballast Kit for 1 400W M155/M135 Metal Halide Lamp, Quad-Tap 120/208/240/277Vac, 60Hz, Successor to ROBERTSON 3P10016 CMH0400H04912 Equivalent to: PHILIPS ADVANCE 71A6092, OSRAM SYLVANIA M400/Multi-PS-Kit Equivalent to: HATCH GCE400MLTCWAAK, FULHAM HHMHMLT4400PD, KEYSTONE MPS-400A-Q-CA Equivalent to: KEYSTONE MPS-400A-Q-CA, MH-400A-Q-CA, MH-400A-P-CA EISA Compliant Visit RobertsonDirect.com for complete technical data.