Ballast Bypass T8 LED Tube LightsBallast bypass T8 LED wiring is one option to retrofit a fluorescent tube lamp. Using the ballast bypass mode, the electronic fluorescent ballast needs to be disconnected and the sockets wired directly to the input voltage. Direct wire T8 LED retrofit lamps are not compatible with fluorescent ballasts. Type B LED replacement tubes are either single ended or double ended and the sockets might need to be replaced to non-shunted type before installation. Use T8 LED bulbs for linear fixtures like high bays, strip lights, vapor tight fixtures, and troffers.
Direct Wire LED Tubes - Type BDirect wire LED tubes or Type B LED tubes are not compatible with fluorescent ballasts so these need to be connected directly to the line voltage to work. The lamp sockets also need to be the non-shunted type with separate wiring contacts for the voltage to go through. In place of the ballast, direct wire T8 LED bulbs have an internal driver to regulate the voltage coming in. The two kinds of Type B LED tubes use single ended wiring or double ended wiring. Single ended ballast bypass LED tubes receive power only on one end while the other end is a dummy lampholder. Double ended ballast bypass T8 LED retrofit lamps can receive power from both ends for faster and easier installation.