EPCO, T8 Retrofit Conversion Kit, STRIP-LIGHT RETROFIT CONVERSION KITS, Retrofit, Lamp Type: Fluorescent, RetroFit Bracket Socket Plates,Self-Tapping Screws, Compatibility: 8 Feet Fixture 4 Lamp, Accommodate Fixture Width: 4.25 to 5 IN, Linear LED Retrofit Lighting (Optional), Ballast Type: Programmed Start