... .9W,14W,18W,20W,27W,28W,30W, 4.Patent product. T5 28W fluorescent lamp Item description:1>Material: light source, control board, adapter ... T8 fluorescent lamp directly and energy saving up to 63%, immediate return on investment2.The tube life span is 20,000 hours . 2 ... up , wide working voltages range. 4 different adapters Installation Examples: T5 28W fluorescent lamp