Aqua One Ocean Mix LED Tube 13W T8 90cm (53258) Fluorescent T8 aquarium tubes are commonly rated at 6000 – 10000 hours of life, however, suffer significant output loss and spectrum shift after around 3000 hours. This means an aquarium fluorescent tube needs to be replaced approximately every 12 months. Aqua One T8 LED Tubes are rated at 50000 hours with minimal output loss and spectrum shift, meaning they do not need to be replaced for many years. In most cases, they will last up to 5 times longer than conventional fluorescent tubes. Aqua One T8 LED Tubes produce comparable light output to equivalent fluorescent tubes, with a saving of at least 50% on power consumption, whilst enhancing the natural beauty of your aquarium. Suitable for: Coldwater, Tropical & Marine IMPORTANT NOTE: Not suitable for light units with an electronic ballast. Use only in a light units with a starter and where the starter can be removed.