... Electronic ballast 2years warranty for standard quality9, Retrofitting T8 to T5 tube, direct plugged into the existing T8 light ... fixture.10, No labour and no modification cost to the existing T8 light fixture.11, PC inflaming retarding ... ,28w,35w,49w,54wCircuit Protection Over-Current Protection, Short-Circuit Protection Abnormal Protection High Voltage Surges Protection Operating Temperature ...