Advance Mark 7 0-10V IZT-4S32-4 Lamp Fluorescent Ballast - F32T8-120/277 Volt - Dimming - 0.88 Ballast Factor Advance Mark 7 0-10V Electronic Ballast Dimmable Programmed Start Only use rapid-start sockets High Power Factor Class P, Sound Rated A Type 1 Outdoor Inherent Thermal Protection