Kessil Reflector-35 for A360X and A500X - Tight 35deg Beam

In this review the Kessil Reflector-35 is assessed as a focused accessory for the A360X and A500X LED fixtures, aimed at reef keepers who need deeper penetration and stronger center intensity. The bottom line: this reflector is for aquarists growing high-light SPS or running deep tanks who want sharper contrast and concentrated output without rewiring or extra hardware. Its magnetic, tool-free attachment and up to 5x center intensity make it a simple upgrade to push light deeper and increase perceived depth and color pop.

Key Features

• Up to 5x center light intensity: Concentrates the beam to increase the center output so demanding corals receive more usable light.
• 35 degree beam angle: Narrows the footprint to focus intensity and improve contrast across the midline of the tank.
• Magnetic attachment: Attaches to compatible fixtures without tools for quick installation and removal.
• Improved depth and dynamics: Produces stronger center highlights and shadow contrast, adding visual depth to the aquarium scape.
• Designed for deep tanks: Extends useful light penetration up to 4 ft, making it suitable for taller displays.

Who It's For

The Reflector-35 is best for reef aquarists using the Kessil A360X or A500X who are focused on SPS growth or have tanks deeper than about 18 in where a tighter beam is needed. It appeals to anyone wanting an easy, reversible way to concentrate light without changing fixtures or programming.

Those with shallow hobby tanks or who prefer very wide, even coverage for mixed reef displays may prefer to skip the reflector, since the narrower 35 degree beam reduces overall spread and concentrates intensity in the center rather than equalizing light across a broad footprint.

Pros & Cons

Pros

• Significantly increases center intensity for demanding corals without modifying the light fixture.
• Magnetic, tool-free design makes it fast to fit and remove during maintenance.
• Narrow beam improves contrast and perceived depth in the aquarium.

Cons

• Reduced coverage area compared with no reflector, so it may require different fixture placement or multiple units for even spread.

Specifications

Our Verdict

The Kessil Reflector-35 is a targeted accessory that delivers concentrated light and improved contrast for A360X and A500X users who need deeper penetration or want to push SPS under a tighter beam. It is good value for hobbyists seeking a simple, removable way to boost center intensity without changing fixtures, though those needing wide, even coverage should consider the trade-offs.

Frequently Asked Questions

Will this attach to my existing A500X or A360X?
Yes, the Reflector-35 is designed to magnetically attach to the A360X and A500X models with no tools required.

How much more light will corals receive with the reflector?
The reflector increases center light intensity by up to 5x and focuses output to improve penetration and contrast.

Is the narrower beam suitable for mixed reef tanks?
The 35 degree beam is best for deep tanks or high-light SPS; mixed or shallow tanks may notice reduced overall spread and should evaluate placement.