No, some ballast may be 120v only, or 120v/240v or true Quad voltage 120v/208v/240v/277v. Depending on fixture type a licensed electrician may be required to alter the voltages. Altering voltages may potentially void ETL rating and warranty. Certain Electronic ballast are “intellivolt” and do not require internal wiring modification to operate at different voltages. Please refer to your individual product for appropriate markings and operation instruction.