How to Wire a T8 Ballast | Home Guides | SF Gate T8 ballasts are designed to work together with T8 bulbs, which are commonly found in 4- or 8-foot lengths. Wiring a direct replacement T8 ballast can be relatively straightforward, although[PDF] CONNECTION INSTRUCTIONS LED Tube Light Installation CONNECTION INSTRUCTIONS LED Tube Light Installation, Ballast Bypass Cut the load and neutral wires from the ballast leaving a su˜cient amount of wire to connect back to the 110 VAC power source. Cut back additional wiring on opposite side of ballast as the LED Tube lamp only requires power at one end. Remove the ballast from the Related searches for 4 light ballast wiring diagram 2 light ballast wiring diagrams4 bulb ballast wiring diagramballast wiring diagram4 lamp ballast wiring diagramballast wiring diagram fluorescent lightst5 ballast wiring diagram2 ballast 4 bulb wiringt8 ballast wiring diagram