The Kessil A360N Tuna Blue Marine lighting (Narrow) is perfect for reef aquariums The A360 Tuna Blue has a lighting spectrum of 10000K Actinic and is only 90 watts This sleek LED lighting create an unrivalled shimmer effect and covers up to 18" surface diameter cover The A160 Tuna Blue is a very bright light that is fully controllable with a manual white / blue light dimming control on the top of all units and includes the all-important UV spectrum required to light up your corals sensational colours Spectral Controller compatible. Each Kessil Light Unit has advanced thermal design offering innovative heat management system to have better efficiency and longevity of the unit The LED is densely packed with high power LED offering more light than competitors With Superior Optical Design the light offers sensational shimmer effects.