Prime 16 LED Fuge Light - Black Body - Aqua Illumination

The AI Prime 16 Fuge is built around a single purpose: driving macroalgae growth in refugiums and sumps. Its LED configuration — six photo red, four red, two cool white, and two violet emitters — is weighted toward the wavelengths marine algae consume most efficiently. At full power the unit draws 46W, which is substantial output for a light of this footprint. In practice, many users find they need to dial intensity back or shorten the photoperiod to keep algae growth manageable, which speaks to how effective the spectrum is.

The standard 80-degree optics are a custom AI design claiming greater than 90% optical efficiency. The diffuse exit surface on the lens helps blend the different LED colors before light reaches the water, reducing the color separation artifacts common in multi-emitter fixtures. The result is coverage that is reasonably uniform across a small to mid-sized refugium section without requiring additional diffusion.

Control is handled through the myAI app, available for iOS and Android. Programming ranges from selecting a pre-defined on/off cycle to building a fully custom schedule with multiple intensity and spectrum waypoints throughout the day. The app supports master/slave grouping, so if you run multiple AI fixtures you only need to program one and push the settings to the rest. For users already running a Neptune Systems Apex controller, MXM compatibility allows the Prime 16 Fuge to be managed directly through Apex Fusion alongside EcoTech Marine equipment, eliminating the need to switch between separate apps.

The fixture measures 4.88" x 4.88" x 1.34" and ships with a 20-foot power cable, which provides enough reach for most sump installations without an extension. Multiple mounting options are available — the specific mounting hardware included or compatible with this unit should be confirmed with the product listing, as mounting accessories are sometimes sold separately for AI Prime fixtures. The compact square footprint fits cleanly over standard refugium compartments in most sumps.