Fluorescent tubes come in various types and sizes. The most popular fluorescent tubes are T8 which are 26mm in diameter and are used all over the world, typically in offices, classrooms and kitchens. T12 fluorescent tubes are the oldest form of tube which have now been made obsolete by all major manufacturers but are still available from us at Lampshoponline. T5 fluorescent tubes are the latest type which are considerably thinner and smaller than T8 and T12 but offer more light output and greater energy savings over them. In this category we have a wide selection of tubes from all major brands.