Model voltage watt tube dia base lifespan Syw-2u05 100-127v/220-240v 5w 9/12mm e27/b22 6000-12000hrs Syw-2u07 100-127v/220-240v 7w 9/12mm e27/b22 6000-12000hrs Syw-2u09 100-127v/220-240v 9w 9/12mm e27/b22 6000-12000hrs Syw-2u11 100-127v/220-240v 11w 12mm e27/b22 6000-12000hrs Syw-2u15 100-127v/220-240v 15w 12mm e27/b22 6000-12000hrs Depends on the products ordered