T5 adapter is used for updating T8, T10, T12 fluorescent lamp with electromagnetic ballast to T5 tube with electronic ballast. Easy-fit T5 adapter saves both energy and installation costs. T5 consumes only a fraction of the energy required by the traditional T8, T10 and T12 tubes while maintaining the same brightness, moreover, with the electronic ballast in the adapter, the replacement will give more than 40% energy saved. And it's installable on existing T8/10/12 lamp frame, the installation is the same way as replacement of a burnt tube. What you need to do is to replace the old tube and starter by the adapter with T5 tube and new starter. That's all. Type Instead of T8 tube Voltage PF Freqency Reflecter Dimension (mm)