... Specification:14W, 21W, 28W, 35W1, Energy saving 45% than traditional T8 , T10 tube.2, High quality with competitive price3, Material: 0 ... 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 converter lampholder 12, ...