GE Lighting Installation Guide LED Double Ended Type Tubes LED14BDT8/G4/840 LED14BDT8/G4/850 LED14BDT8/G4/865 BEFORE YOU BEGIN Safety Precautions LED retrofit kit installation requires a knowledge of luminary electrical systems. If not qualified do NOT attempt installation. Contact a qualified electrician. Ta install the type B LED T8, please read the entire installation guide carefully.