T8 Freshwater Lamps

T8's are conventional 25mm diameter lamps with powerful penetrating white light accentuating the natural colours of fish and replicating a reef environment. The number indicates the diameter in 8ths of an inch, so the one inch diameter tubes that most of us are familiar with are T8 (eight 8ths of an inch), and the fatter tubes that used to be the standard, and that are still used by some are T12.