T5 Tube 16 mm Optimum usage of T5-technology. New specifically designed light tubes offer additional possibilities. Optimised light flux for maximum efficiency. Maximum output (Lumen per Watt). Ideally co-ordinated spectrum combined light colours (for plants or corals). Clear light high brightness. Lifelike unadulterated colour rendering. Low energy consumption. Long service life (average service life 20.000 hours). All usual dimensions suitable for most aquariums (tube lengths 549 849 1149 and 1449 mm). For fresh water and marine aquariums (all in two options and make a superb combination)