MarsAqua Dimmable 300w LED Aquarium Light lighting Full Spectrum For Freshwater and Saltwater Fish Coral Tank Blue and White LPS/SPS Day & Night: Two combinations of lighting beams specifically designed for aquatic plants, booming the growing process by providing all necessary spectrums. Two switches enable you to freely adjust luminosity and make your own perfect lights. Truly Transparent: Professional LED Lens with transmittance to be 25% higher than ordinary lens by converging lighting beams enables lights to reach as deep as 1m into tanks with few loss of luminous energy. Keep Cool All the Time: By using copper whose thermal conductivity is far beyond any other metals, plus advance venting system of blowing air rather than suction, the MarsAqua lights achieved the best cooling performance ever seen in similar products. Free Combining: Equipped with double universal cascade. Normally one LED aquarium light is suitable for a 55 gallon 38*24 fish coral tank, and for bigger tanks, you can series multiple sets of LED light together at the same time without requiring more socket. Guaranteed Satisfaction: Promised 3 years authentic warranty supported by service center in California. Unconditional 30 days money back if any problem appeared. Within 1 year, the shipping fee and replaced parts fee is free. From 1 to 2 years, youll be responsible for shipping charges and replaced parts is free. From 2 to 3 years, youll be responsible for shipping charges and handling fee.