DSunY Smart Marine Light for 48&rdquo; Aquarium Tank, No Fan Noise, Coral Reef Saltwater Lamp Programmable Timer Sunrise Dimmable This aquarium Led System is designed to imitation natural sun for 48-60 reef coral and marine fish tank -2*21 lights + 1 smart controller+ adjustable rail kits, max 60 cover -24hours, 4 channels, 0-100%, free set & many preset mode for coral -No fan, no noise; DC power, water proof cord, best safety -Higher 32% efficiency due to smart mode& lens design