Radion XR15 G6 Blue LED Light Fixture - EcoTech Marine

The EcoTech Marine Radion XR15 G6 Blue is the compact, blue-weighted member of the G6 Radion line. Its 7 by 7-inch footprint is particularly relevant for compact reef displays, installations where a large fixture would be visually intrusive, and longer aquariums that benefit from several independently positioned light sources. EcoTech specifies a recommended light spread of 24 by 24 inches and a maximum spread of 30 by 30 inches, rather than assigning the fixture a gallon rating. This makes aquarium dimensions and the intended layout more useful selection criteria than total water volume. The Blue configuration emphasizes actinic color and coral fluorescence while retaining programmable control over its individual color channels.

The defining optical change is EcoTech’s HEI2 system, which combines a redesigned primary lens with the geometry of the Hemispherically Edge Illuminating secondary lens. This increases the stated spread from 110.5 degrees to 126.3 degrees. The broad beam is intended to produce more even PAR, improve color mixing, and reduce concentrated illumination directly beneath the fixture. EcoTech also describes light reflecting from aquarium side panels and returning to the display, helping illuminate coral undersides and reduce shadowing. This wider distribution is especially useful when arranging an XR15 over a compact aquascape or spacing several XR15 fixtures along a larger reef.

For planning purposes, the recommended coverage area is 24 by 24 inches when the fixture is installed at EcoTech’s recommended mounting height of 8 to 10 inches. The listed 30-by-30-inch maximum spread should not be treated as identical to the recommended footprint. Aquarists choosing between one or several fixtures can use the 24-inch square recommendation as the more conservative starting point. Aquascape position also matters when arranging coverage: the wide HEI2 beam is designed to reduce shadows, but branching or closely packed colonies can still make fixture placement important. A multi-fixture arrangement allows each XR15 to be moved relative to coral placement rather than relying on one central light source.

The XR15 format is particularly flexible for elongated tanks because multiple compact fixtures can be distributed along a rail. EcoTech’s RMS Multi-Light Track System allows Radions to slide back and forth so spacing can be adjusted for the desired coverage. Tracks are available in lengths up to 8 feet and can be supported by RMS multi-light arms or suspended with the RMS Hanging Kit. The track works with XR15 and XR30 fixtures, including mixed XR15 and XR30 layouts. This gives experienced aquarists a way to use XR15 units over separate aquascape zones or combine fixture sizes where the physical layout calls for different coverage approaches.

Choosing an XR15 rather than an XR30 is primarily a decision about fixture scale and layout flexibility based on the supplied specifications. The XR15 has a recommended 24-by-24-inch spread, while EcoTech states that the XR30 model can provide even PAR across almost four feet of coverage area. The XR15 therefore offers a compact point of installation and can be repeated across the aquarium, while the XR30 is the broader-coverage option. Multiple XR15 fixtures may be preferable when the goal is to position separate light sources over islands, leave intentional gaps, or make spacing adjustments on a track. The source does not provide a universal fixture-count equivalency between the two models.

The G6 Blue diode mix is deliberately weighted toward shorter wavelengths. Its 50 LEDs include 16 Royal Blue, 16 Blue, six Violet at 430nm, two UV at 395nm, one UV at 405nm, and two UV at 415nm. It also includes four Cool White, two Warm White, and one Red diode. The addition of 395nm diodes extends the mix deeper into the UV range than prior configurations described in the source, with the goal of increasing fluorescence and color intensity. This model is the appropriate G6 variant for aquarists who place a higher priority on a blue or actinic presentation than on a broadly balanced visual spectrum.

Blue does not mean the fixture is locked into a single appearance. EcoTech states that the G6 Blue can be tuned between actinic and crisp aesthetics, allowing the user to adjust the presentation rather than accepting a fixed blue output. The alternative XR15 G6 Pro uses a more balanced LED mix with proven spectrums described as similar to metal halide output. That distinction should guide the choice: select the Blue when fluorescence and a blue-weighted presentation are central to the display, or consider the Pro when the more balanced diode mix better matches the desired appearance. Both are programmable Radions, but their underlying LED mixes are not the same.

Programming is handled through EcoTech’s free Mobius app on a current-version iOS or Android device, with no separate controller required for standard local wireless control. Mobius provides access to color programming, schedules, moonlight, and weather simulation. It can also centralize compatible EcoTech equipment such as lights, pumps, dosing, and flow devices. For initial tuning, the broad channel selection allows the aquarist to establish both the desired blue character and the daily schedule in one interface. EcoTech also identifies the CoralLab AB+ spectrum as a proven program available within the Radion platform, including its use as a popular SPS-oriented lighting program.

Aquarists using Neptune Systems Apex can integrate the XR15 G6 Blue through the compatible MXM module. This places wireless control of supported EcoTech and Aqua Illumination pumps and lights within Apex and Apex Fusion, reducing the need to switch between separate control interfaces. MXM compatibility should not be confused with direct Apex control without the module: Mobius is the fixture’s included app-based control path, while Apex and Apex Fusion integration is provided through MXM. This distinction matters when budgeting and planning a control system, because no additional controller is needed for Mobius operation, but the source identifies MXM as the route to the Neptune ecosystem.

The fixture measures 7 inches long, 7 inches wide, and 1.5 inches high, with a listed weight of 3.5 pounds. Maximum variable power usage is 105 watts, and the power input is 100–240VAC, 4.0A, 50/60Hz. The 13-foot cable provides useful reach when planning the route from the fixture to its power supply and available electrical connection. Because the specified mounting height is 8 to 10 inches, installation planning should account for the combined clearance above the water, the selected mounting hardware, and cable routing rather than considering only the thin body of the light.

For a single-fixture installation, EcoTech offers the RMS Single Mounting Kit, which allows the light to be mounted at 90-degree increments. For multiple XR15s, the RMS track provides the more adjustable approach because each light can slide along the rail. Eyelet mounts are included with the fixture, and hanging solutions are available when attaching arms to the tank is not desirable. G6 Radions remain backward compatible with the extensive mounting options and accessories available for the previous Radion generation. The box also contains the power supply, power adapter cable, microfiber cloth, and quick start guide, but the RMS arms, track, and hanging systems are presented as mounting options rather than included components.

The XR15 G6 Blue is ultimately best evaluated as a 24-by-24-inch recommended-coverage fixture rather than as a light for a particular gallon count. A single unit fits compact square coverage needs, while repeated XR15s create an adjustable multi-point layout for longer tanks. The 126.3-degree HEI2 spread, blue-heavy 50-diode array, 395nm UV inclusion, and actinic-to-crisp tuning distinguish it from the more balanced Pro version. Its 105-watt maximum usage, Mobius programming, optional MXM integration, and compatibility with both individual and rail-based mounting systems provide the practical information needed to plan power, control, spacing, and installation before selecting fixture quantity.