What are T-8 and T-12 fluorescent tubes?
The numbers designate different diameters of fluorescent tubes. T-8 tube: 1″ diameter. (8/8ths of an inch). This is found in newer fixtures. It uses electronic ballast only. The fixtures designed for T-8s may have 2-3-4 tubes per fixture. We call our tube a ÒT8 PlusÓ because it saves energy, is full spectrum and is brighter than the others. Most T-8 tubes use 32 watts of electricity. Our outstanding Indoor Sunshine tube uses only 25 wts of electricity. T-12 tube: 1½” diameter. (12/8ths of an inch). This is the standard size older tube. It uses magnetic ballast only. It usually uses 40 wts of electricity.
