Retrofit kits are perfect for customizing your own lighting for aquariums that already have hoods or canopies. The Aqualight retrofit kit provides complete lighting for saltwater and reef aquariums, as well as freshwater. Both full-spectrum daylight and blue actinic lamps provide a full day's worth of light, exactly what corals need to thrive. The Aqualight retrofit kit is a simple, complete lighting source for your aquarium.