The 59 W Fluval Reef LED 4.0 is a saltwater light for aquariums 117.5–155.1 cm. The spectrum is built for corals, with actinic wavelengths that support photosynthesis and colour.

Colour channels, the day cycle and preset environments are controlled in the FluvalConnect app. The bar is IP67 rated, has a glass lens and mounts with extendable brackets.