There are T8 light tubes tailored to whatever fish tank you have whether it is freshwater, tropical or marine. The marine tubes especially are designed with a spectrum to pick out and highlight the colours and fluorescence of corals.
Here at Swell UK we carry Arcadia's comprehensive range of T8 bulbs. Each bulb will enhance the natural beauty of fish, corals and marine life. For example, Arcadia's Marine Blue Actinic lamp not only reflects the colours of corals strikingly,it also promotes healthy growth of invertebrates.
T5 tubes are the newer, more compact version that are energy and cost effective, offering a high performance.