GE UltraMax Proline Electronic Ballast, 120/277 Volt Instant Start Ballast, Low Power Ballast Factor, Ballast for Fluorescent Light (3) or (2) Lamp T8, Compatible with F32T8/WM and F17T8 - - Amazon.com
ADVANCE ICN3TTP40SC35M : ELECTRONIC BALLAST 3 LAMP 40W CFL (4-PIN) 120-277V | Gordon Electric Supply, Inc.
Replace 3 Lamp 2 Rapid Start Ballasts With 1 Instant Start - El 101