TLED T8 lamps are a type of LED, or light emitting diode. TLED T8 lamps are more energy efficient than fluorescent T12 and T8 lamps, and they last longer too. TLED T8 lamps come in three different types: Type A, Type B, and Type C. Type A TLED T8 lamps work with ballasts, while Type B TLED T8 lamps bypass ballasts. Type C TLED T8 lamps use an external LED driver. Choose the TLED T8 lamp type that best fits your needs. You'll be glad you made the switch to TLED T8!