Introducing the new T8 LED Lamps from Arcadia, the fuss free way to upgrade your current T8 lighting to brighter and energy efficient LED. Fully compatible with current T8 controllers from Arcadia and comparable to T5 light output which we believe makes it the must have for upgrading to LED at the fraction of the price. The 12k Ultra White LED\'s result in an intense white light, accentuating natural fish colours and promoting marine photosynthesis. Ideal for salt-water aquariums and it is recommended to use with the Marine Blue Lamp for a day and night effect. Features Include 17W is equivalent to a 36W fluorescent lamp. 72 x 0.25W LED\'s. Uses 1/3 of the electricity and produces 70% more effective light than the equivalent fluorescent lamp. Overall, 5x more light for every kilowatt hour. Adds \'ripple effect\' to an aquarium. Compatible with current Arcadia Controllers. Lamp is a twist manoeuvrable to allow a more specific lighting position.