Selecting the right fish tank lighting is essential for a successful freshwater or saltwater aquarium. Lighting is one of the most important components of a reef aquarium. Correct color with the appropriate intensity is a critical factor in the health of aquarium organisms. A combination of LED & fluorescent actinics, 6,500-degree K, and 20,000-degree K metal halides are what many aquarium hobbyists consider the most pleasing, not only for the tank inhabitants, but also for viewing pleasures. Note: A wavelength of 430 nanometers (nm), is one of the two wavelengths where photosynthetic efficiency is at its highest. This wavelength can be accomplished from many of our new LED Lighting systems that we are currently offering.