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Kessil

A500X Controllable LED Aquarium Light - Tuna Blue

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Out of stock
SKU
232123
Rating:
88% of 100
5  Reviews Add Your Review
$849.00 $849.00

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Details

The power, coverage, and penetration of metal halide, without the heat or energy consumption.

Kessil A500X LED light delivers greater capability than ever before, and can meet the needs of large SPS dominated systems with ease. Thanks to Kessil’s dense matrix LED arrays and specialized optics, you can cover your tank in brilliant light while blending spectrum better than any other LED light on the market. Using Kessil Logic, tuning the light for optimal coral growth and coloration is easy since the A500X will automatically adjust to a balanced spectrum for the light color that you want to see. Kessil lights have always been known for their outstanding shimmer effect while maintaining uniform color mixing throughout the aquarium. We have used all types of Kessil LED lights over the years and have been very impressed with their quality, control, and lighting output. 

 

Features

  • Wide Coverage, Deep Penetration
  • Higher Photon Volume Density
  • Advanced Color Control
  • Light Shaping Capability
  • Smart Communication & Control

 

The A500X is a powerful 185W high intensity LED designed specifically for experienced SPS coral growers. The beam of this flagship A500X can be adjusted with included 55 degree reflector, or with the optional 35 degree reflector, allowing you to deliver the light at the proper spectrum and intensity for optical SPS coral growth, health, and coloration.

 

Recommended Coverage - 36" x 36" for SPS Dominant Systems

 

Tuna Blue

Perfect for reef tanks. The Tuna Blue is capable of producing light from a rich deep blue all the way to bright natural daylight. Kessil has been tuning the Dense Matrix LEDs to bring out the best growth and coloration in corals. The adjustable spectrum lets you choose the color you want to see, while Kessil Logic ensures a balanced spectrum and power output.

 

Superior Illumination

Coverage - The newly designed A500X optics along with the latest generation Dense Matrix LED array to provide a broad delivery of light and eliminate shading.

Spectrum - The well-known Tuna Blue spectrum has been proven by its users to promote coral growth and enhance coloration. With Kessil Logic, it ensures consistent power output and coral growth across the tunable spectrum.

Shimmer - 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.

Penetration - Kessil's Patented Dense Matrix LED technology concentrates multiple LED chips into a single array, creating a powerful and penetrating light source with wide coverage. The standard 110 degree reflector can reach 24" beyond the water’s surface in most reefs. Penetration can be further enhanced by using the narrow 55 or 35 degree reflectors, reaching as far as 4 feet below the surface.

Color Mixing - Different wavelengths are seamlessly blended within a single LED array, emitting uniform color across the coverage range, and reducing individual color separation to almost nothing.

 

Design

Full-Color Spectrum - In addition to the popular Tuna Blue spectrum, users can add in Red, Green, and Purple (Violet+Indigo) by using the new Spectral Controller X or the Kessil WiFi Dongle.

Heat Management - The innovative heat management system enhances longevity and efficiency on all A500X lights

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

 

Control

Wireless - The Kessil WiFi Dongle lets you control any A500X light without the need of additional cords or hardware. The WiFi Dongle will plug right into the K-Link connector and let you connect directly to the light with any Android or iOS phone. The intuitive app boasts a ton of features that lets you do everything from daily automated programming to manual programming for photoshoots or just showing off your reef tank. 

Hardwired - The Kessil Spectral Controller X is packed with features that let you simulate the natural rise and fall of the sun throughout the day. You do not necessarily need the Spectral Controller X, but adding it to your A500X lights will unlock additional features and modes that give you endless customization of the lights for your aquarium. You can even connect multiple Kessil A500X LED Lights together for larger tanks with the K-Link Cable to create a seamless day-cycle between all the lights. 

 

Technical Specifications

  • Dimensions: 3.7" x 5.2" / 9.4cm x 13.3cm
  • Unit Weight: 1.72lb / 0.78kg
  • Spectrum: Tuna Blue + Red + Green + Purple
  • Power Adapter: 100-240V AC 50-60Hz (input), 48V DC (output)
  • Power Consumption: AC 185W max

 

What's Included?

1x A500X Tuna Blue

1x Power Adapter

1x AC Adapter Cable

1x Hanging Ring

2x Metal Screw Hook

2x Hanging Bracket

1x 55 degree Reflector



More Information
More Information
SKU 232123
UPC 092145345221
Aquarium Type Saltwater
Apex Compatible No
Category Fixtures
Application Reef/Coral Growth
Features Boost Fluorescence, Dimmable, Energy Efficient
Fixture Style Puck / Pendant
Max. Light Coverage (Length) 36 in.
Max. Light Coverage (Width) 36 in.
Power Consumption 185W
Control Type WiFi (with optional controller), Digital DC Control (with optional controller), Onboard Controls
Optional Mounts Mounting Arm
Power Cord Length 10 Feet
Warranty 12 months
Color Black
Reviews 5
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You're reviewing:A500X Controllable LED Aquarium Light - Tuna Blue
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Product Questions

Product Questions

I am resetting up a 120 gallon 2' x '2' x 4' tank that I tore down 2 years ago when moving from Oregon to Florida. How many of the A500X for SPS in a tank this size and what height do you recommend? Also what is the best mounting option, prefer not to hang from the ceiling like I used to do with my old lights.
Question by: Ed on Nov 10, 2025, 3:52 PM
Hi Ed,

For one A500X, the Recommended Coverage is - 36" x 36" for SPS Dominant Systems. With this being said, I'd recommend at least 2 lights at minimum for the best PAR coverage. If your tank rim did not exceed 1.25" wide, you would be able to use the A-Series Mounting Arms or Goosenecks for these light fixtures instead. If not, they would have to be hung or custom DIY mounted.

As for height mounted above the water surface, I would recommend about 8-12", but this can really depend on your setup whether you'd need to raise them lower or higher.
Answer by: Kristen Macdougall (BRS Staff) on Nov 12, 2025, 10:34 AM
How many of these lights for a 84*24*24 SPS dominant tank ? Cheers
Question by: Marcelo Guimarães on Feb 1, 2025, 6:49 PM
We would recommend x3 A500X Tuna Blues for this size tank.
Answer by: Grace (BRS Staff) on Feb 21, 2025, 2:54 PM

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