High intensity light for freshwater or saltwater aquariums promotes coral, invertebrate and plant growth. Features photosynthetic, deep marine spectrum. Offers total illumination for living corals, marine algae and freshwater plants. Ideal for cichlid community aquariums, simulates natural lighting for cichlids. Made in USA. How much light does my marine aquarium require? The quantity of light required for marine aquariums will vary depending on the life forms kept. In fish-only setups, 2 Watts per gallon is sufficient. Reef-type systems containing primarily soft corals should have a ratio of 2 to 4 Watts per gallon. A deduction of 15% to 20% of the rated tank volume is permissible to account for water displacement due to live rock formations. How much light does my freshwater aquarium require? To achieve appropriate lighting, a general rule is to have a range of 1 to 3 watts of light per gallon of water in your aquarium, subtracting 10-15% of the tank volume to account for volume of materials inside the tank. Adequate lighting range = (1 to 3 watts/gallon) - (10%-15% of tank volume)