ProLED T8 Linear Bypass Lamps are energy efficient, long lasting replacements for traditional T8 and T12 fluorescent linear lamps. Most reliable and efficient way to retrofit existing Linear Fluorescent T8 and T12 luminaires with simple rewiring necessary to remove the ballast. 50,000-hour life resulting in lower maintenance costs over time. Uses 49 percent less energy than a standard Fluorescent T8 and lasts up to 66 percent longer.