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Kessil A500X Tuna Blue LED Light


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The Kessil A500X. High Intensity. Perfect Color Mixing. Expert SPS Coral Growth.

The Kessil A500X is a powerful 185W high intensity LED designed specifically for SPS coral growth. This fixture shares all the known and loved features of the previous X-series models-- Dense Matrix LED technology with Kessil Logic, superior color mixing, natural shimmer effect, innovative heat management and App control-- while delivering a concentrated and tailored light array for optimum SPS coral growth, health, and coloration. The AP500X`s beam can be adjusted with optional 35 and 55 degree reflectors to allow for SPS growth in a variety of environments, as well as to accommodate for custom reef systems which may feature deeper tanks or require higher light mounting.

The A500X rounds out the X-Series Family with each of the 3 X-Series lamps filling a specific role within the larger hobbyist market:

  • A360X: Versatile Utility tool - Flexible for small tanks, scalable to large ones.
  • AP9X: Perfect for Mixed Reefs - Unbeatable coverage. The best coverage on the market, designed for your standard mixed reef tanks that most hobbyists have (3-4’ long, 75-120 gallons per unit).
  • A500X: SPS Dominant and Custom Systems - High powered for high end SPS tanks. Custom reflector options allow for deep tanks or mounting high above the tank.


Higher Powered
The A500X is a powerful high intensity LED tailored specifically for SPS Coral growth, emitting 185 watts of power spread across 100 individual diodes.

Full Color Control with Kessil Logic
Experience color control with Kessil Logic, opening unlimited color combinations for aesthetics while maintaining the performance. Kessil Logic ensures that cosmetic color settings do not interfere with the core spectrum, allowing users to dial in a preferred color without disturbing coral health.

Light Shaping Capability
The A500X can be used with optical accessories to shape light, such as the Reflector-35 (sold separately) and Reflector-55 (included), allowing users to increase penetration for deep tanks, mount high above the tank, or modify the look of the aquarium to their liking.

Dense Matrix LED
Densely-packed LED array emits more high-quality light than competing fixtures.

Superior Illumination

Wide Coverage. Deep Penetration.
Patented Dense Matrix LED technology concentrates multiple LED chips into a single array, creating a powerful and penetrating light source with wide coverage. The A500X is also compatible with the Reflector-35 and Reflector-55, allowing you to adjust light coverage and penetration to suit a variety of SPS coral setups.

    • Penetration up to 2ft and coverage of ~ 36" x 36" with the 110 Degree Reflector (native to fixture)
    • Penetration up to 3ft and coverage of ~ 30" x 30" with the 55 Degree Reflector (included in box)
    • Penetration up to 4ft and coverage of ~ 24" x 24" with the 35 Degree Reflector (sold separately)

The A500X features a full range of individually adjustable color channels (red, green, purple) in addition to Kessil`s signature Tuna Blue spectrum. All color channels can be accessed and adjusted via the Kessil app.

The Kessil shimmer effect gives your tank a beautiful, natural, sunlit look comparable to the shimmer of a Metal Halide fixture. It is like replicating your own piece of the ocean.

Color Mixing
Different wavelengths are seamlessly blended within a single LED array, emitting uniform color across the coverage range.


Compact Size
At 3.7 inches tall and 5.2 inches in diameter, the A500X is only slightly larger in size than the popular A360X, yet with twice the power.

Heat Management
With its large, built-in heatsink, open airflow design, and creative fan layout, the A500X offers efficient cooling with minimal noise.

On Board Controls
Users can fine-tune the mixed white and mixed blue channels via the manual knobs built into the fixture. With the additional purchase of the Spectral Controller X or WiFi Dongle, users can fully round out the spectrum with red, green, and purple (violet + indigo) color controls. 

Technical Specifications

Dimensions: 3.7" x 5.2" / 9.4cm x 13.3cm (H x D)
Unit Weight: 1.72lb / 0.78kg
Spectrum: Tuna Blue + Red + Green + Purple (Violet + Indigo)
Coverage: 36" x 36" for SPS Dominant Systems
Control Options: Manual Knobs, WiFi Dongle, Spectral Controller X
Mounting Options: A-Series Gooseneck, Mounting Arm, Hanging Ring
Power Adapter: 100-240V AC (input) 48V DC (output)
Power Consumption: AC 185W max

What`s in the Box

  • 1x A500X
  • 1x Power Adapter
  • 1x AC Adapter Cable
  • 1x Hanging Ring
  • 2x Metal Screw Hook
  • 2x Hanging Bracket
  • 1x Reflector-55 

Compatible Kessil Accessories

The Kessil Reef Lighting Choice For You

(Model) 18"x18"
A80 X X X
A160WE X X X
A360NE X X X
A360WE X X X
AP700 X X X
A500X X X X

Product Manuals & Documentation

Kessil A500X Tuna Blue LED Light

Owner's Manual available for download in Adobe PDF file format
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