TCP has a new Type AB LED T8 tube, meaning they can work on the existing ballast (if compatible) as well as bypass the ballast and wire direct once the ballast dies out. This provides versatility for those looking to use up the remaining power of their ballasts and then wire direct as needed later on. Available in Glass or Plastic construction and in color temps of 3000K, 3500K, 4100K or 5000K in both styles.