Philips Advance - 3 or 4 Lamp, 120-277 Volt, 0.75 to 0.92 Amp, 0 to 39, 40 to 79 Watt, Instant Start, Electronic, Nondimmable Fluorescent Ballast - 77692283 - MSC Industrial Supply
GE UltraMax T8 4-Bulb Residential/Commercial Fluorescent Light Ballast in the Ballasts department at Lowes.com
Alpha T8 T10 T12 LED Light Bulbs Clear or Frosted Lens 4FT 18W 6000K-6500K Cool White Bright Dual End Replacement 40W 4 FT Fluorescent Lamp Ballast Bypass Home Office Shop Pack of
GE T8 4-Bulb Residential Fluorescent Light Ballast in the Ballasts department at Lowes.com
FLP/FLT Replacement Ballast, 120V (used for (2) 4' bulbs)
Philips Advance Electronic Ballast 120V to 277V for (3 or 4) F32T8 | ICN4P32N35I | Bulbs.com
GE T8 4-Bulb Residential Fluorescent Light Ballast in the Ballasts department at Lowes.com
GE UltraMax Proline Electronic Ballast, 120/277 Volt Instant Start Ballast, Normal Ballast Factor, Ballast for Fluorescent Light (1) or (2) Lamp T8, Compatible with F32T8/WM and F17T8 - Electric Plugs - Amazon.com