Energetic Lighting’s E3T8G(2) series of LED ballast bypass T8 tubes are designed to emulate the look and feel of traditional 2-foot and 4-foot fluorescent T8 tubes. The lens is made of a durable glass or Polycarbonate materials, both engineered for maximum light diffusion as well as reliability. Rated with an L70 lifetime of at least 50,000 hours, these rugged tube lamps are designed for many years of maintenance-free operation.