The Fluval Reef 4.0 is a full-spectrum LED fixture for saltwater reef tanks, built around a strong actinic range that corals use for photosynthesis and color. All control runs through the FluvalConnect app: independent color channels, a programmable 24-hour cycle with sunrise, midday, dusk and night, and preset environments. It is IP67-rated with a glass lens and an aluminum alloy frame, and mounts by extendable brackets, risers or suspension. Against rivals it stands out for app depth and weather sealing rather than raw output, and its app-only control is the main point of friction for owners who want on-fixture buttons or a screen.
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Lowest price we've seen: $199.99 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.
Owners like the color rendering and the depth of app scheduling, and the sealed build holds up around saltwater. The recurring complaint is that control lives only in the app, with no physical buttons or display on the fixture.
The Fluval Reef 4.0 LED is a full-spectrum light for saltwater aquariums. It includes an actinic range to support coral photosynthesis, growth and color. The light is engineered in Germany.
It is controlled only through the FluvalConnect mobile app. The app gives independent control of the color channels and a programmable 24-hour light cycle, with adjustable sunrise, mid-day, dusk and night settings. It also offers special effects and several preset aquarium environments, or you can create your own.
The light has an IP67 rating for protection against water, moisture and dust. A glass lens provides clear illumination. The aluminum alloy frame dissipates heat evenly to improve lighting efficiency and longevity. Extendable brackets fit a range of aquarium widths for on-tank mounting, and included riser brackets allow adjustable vertical positioning.
