578 36 W T8 Fluorescent Tube, 3350 lm, 1200mm, G13. A new generation of triphosphor coated fluorescent tubes. Using T8 triphosphor tubes in place of T12 and T8 halophosphor tubes increases light levels and lamp life by up to 20000 hours, when used with electronic control gear. In addition, these T8 tubes provide improved colour rendering performance, reduced maintenance and energy costs. These lights start instantly with brighter lighting compared to standard fluorescent tubes.