Get rid of your old T8 fluorescent tubes and replace them with this Kobi LED-T8F-4-2350-41-NB 22-watt LED T8 tube. It offers exceptional LED lighting, while reducing energy and maintenance cost. It has a cool white color temperature of 4100 Kelvin and will last up to 50,000 hours. This lamp is an ideal T12 replacement as well since it uses the same non-shunted lampholders that a T8 does. With very minimal rewiring and easy installation this tube is a great transition form old fluorescent light source to new led technology. To be installed by licensed electrician only. Requires non-shunted lamp holders (tombstones). See part no. SOCK-L13051U. Do not use with dimmers.