Fluorescent Tube Starter. 40-22w. Lamp size 20 x 38. 240 Volt. Fluorescent Lamps are now widely used in commercial and domestic applications due to the high energy savings they offer, over traditional lighting, with the benefit of high light output, superior quality and longer life span. Standard Halophosphate T8 and T12 sizes are available in various sizes. Triphosphor T5 and the new T6 circular offer excellent rendering in various sizes. 8000-12000 hours life.