GE Lighting UltraStart Proline Electronic Ballast, 120/277 Volt Program/Rapid Start Ballast, Normal Ballast Factor, Ballast for Fluorescent Light (1) or (2) Lamp T12 - Electric Plugs - Amazon.com
Fluorescent T12 Ballast for 1 or 2 Lamps - Rapid Start. MEBULBS
GE UltraMax Proline Electronic Ballast, 120/277 Volt Instant Start Ballast, Normal Ballast Factor, Ballast for Fluorescent Light (1) or (2) Lamp T12 - Electric Plugs - Amazon.com
Philips Advance Centium 110-Watt 1- or 2-Lamp T12 8 ft. HO Rapid Start High Frequency Electronic Fluorescent Replacement Ballast 520486 - The Home Depot