Keystone Replacement Ballast KTEB-432RIS-1-TP-SL Value Pack - (2 Ballast Pack) Special Value Pack - 2 Count Keystone Technologies KTEB-432RIS-1-TP-SL Electronic Ballast Input Voltage: 120V Operates 4 Lamp F32T8 Lamps - Replaces Keystone KTEB-432RIS-1-TP* Starting Method: Instant